{"citations":{"source_mix":{"company_owned":19,"independent":10,"unclear":0},"sources_referenced_by_questions":0,"support_mix":{"direct":19,"partial":10},"total_sources":29,"unique_domain_count":17},"claims":[{"claim_id":"claim-001","confidence":"verified","observed_at":"2026-09-27","platform_support":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"predicate":"platforms_analyzed","qualifier":"valid included platform responses","subject":"Best Perch Stairlifts for Narrow Stairs","unit":"platforms","value":7},{"claim_id":"claim-002","confidence":"verified","observed_at":"2026-09-27","platform_support":["deepseek","google","grok","kimi","perplexity"],"predicate":"final_consensus_rank","qualifier":"Perching Seat for Tight Staircases","subject":"Stannah Sadler","unit":"rank","value":1},{"claim_id":"claim-003","confidence":"verified","observed_at":"2026-09-27","platform_support":["deepseek","google","grok","kimi","perplexity"],"predicate":"platform_mentions","qualifier":"out of 7","subject":"Stannah Sadler","unit":"platforms","value":5},{"claim_id":"claim-004","confidence":"verified","observed_at":"2026-09-27","platform_support":["anthropic","grok","google"],"predicate":"fit_rating_count","qualifier":"strong","subject":"Stannah Sadler","unit":"platforms","value":3},{"claim_id":"claim-005","confidence":"verified","observed_at":"2026-09-27","platform_support":["openai","perplexity"],"predicate":"fit_rating_count","qualifier":"good","subject":"Stannah Sadler","unit":"platforms","value":2},{"claim_id":"claim-006","confidence":"verified","observed_at":"2026-09-27","platform_support":["kimi"],"predicate":"fit_rating_count","qualifier":"mixed","subject":"Stannah Sadler","unit":"platforms","value":1},{"claim_id":"claim-007","confidence":"verified","observed_at":"2026-09-27","platform_support":["deepseek"],"predicate":"fit_rating_count","qualifier":"uncertain","subject":"Stannah Sadler","unit":"platforms","value":1}],"content_scope":"aggregated facts, computed metrics, and retrieval summaries","entities":[{"average_rank":1.4,"best_rank":1,"entity_id":"entity-001","entity_type":"company","final_rank":1,"name":"Stannah Sadler","platform_mentions":5,"platform_share":0.7142857142857143}],"identity":{"dataset_url":"https://aginginplaceindex.com/datasets/stairlifts/perching-seat-for-tight-staircases/stannah-sadler.json","page_url":"https://aginginplaceindex.com/stairlifts/perching-seat-for-tight-staircases/stannah-sadler","report_type":"fit_review","study_id":"AIPI-STUDY-57D086FD6B0D","title":"Stannah Sadler Review for Narrow Stairs"},"limitations":["Use the run researchdate as the study date. Platform-reported dates are provenance metadata and do not independently prove freshness.","All included platforms evaluated fit, but platformmentions counts only platforms that named the entity during ranking discovery.","Do not resolve conflicting product names, pricing, or capabilities by guessing; describe the conflict and tell buyers what to verify.","The supplied URLs were collected from platform responses and were not independently validated by the writer stage.","Company-owned citations materially outnumber independent citations; do not describe company claims as independently verified.","Platform-reported research dates differ from the authoritative run date; disclose this as a methodology limitation.","Citations are platform-reported evidence, not independently verified facts. No-search model claims require explicit verification before being described as current facts."],"methodology":{"fit_rating_contract":["strong","good","mixed","weak","uncertain"],"included_valid_platform_count":7,"maximum_finalists":10,"minimum_mentions":2,"name":"Aging in Place Index cross-platform AI consensus analysis","platforms_included":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"platforms_queried":["openai","anthropic","deepseek","grok","perplexity","kimi","google"],"stages":["ranking_discovery","fit_assessment","normalization","editorial_synthesis"],"version":"alias-table-1"},"provenance":{"generated_at":"2026-09-27 14:29:43.324265+00","research_date":"2026-09-27","source_snapshot_sha256":"b54f593f0cf0703906dbe3376c253b321eb0d98388488369454a35de4a9e1542","verification_scope":"public_verification"},"ranking":{"candidates_evaluated":8,"qualified_finalists":5,"ranking_unit":"Perch stairlift model and manufacturer"},"schema_version":4,"summary":"Stannah Sadler is a good fit for homeowners whose main obstacle is limited stair width or difficulty using a conventional seated stairlift, provided the buyer verifies dimensions and posture suitability in person. Five of seven platforms named Stannah Sadler during the ranking stage, and it finished first overall with an average listed rank of 1.4. The strongest reason to consider it is its purpose-built perch posture: an elevated, saddle-style seat that reduces the knee-clearance problem that blocks conventional seated lifts on tight stairs. The main limitation is that Stannah does not…","target_buyer":"Homeowners with narrow staircases where a traditional seated stairlift would block access or create clearance issues","topic":{"base_category":"Stairlifts","category_criteria":["Minimum staircase width","perch seat angle","folded footprint","rail profile","knee clearance","swivel/parking options","safety sensors","installation requirements"],"geography":"United States","slug":"best-perch-stairlifts-for-narrow-stairs","title":"Best Perch Stairlifts for Narrow Stairs","use_case":"Perching Seat for Tight Staircases"}}