Unverified50% confidenceEventExact time
1977年旧金山的504坐入抗议持续28天，是美国历史上最长的政府建筑占领行动
1
Sources
50%
Confidence
Long-term
Relevance
7/14/2026
First Seen
Sources
92%美国城市官网无障碍不达标：ADA合规现状与改进指南
hackernewshackernews7/9/2026
Cite This Claim
Stable URI
https://kongchang.com/claim/503650API
curl https://kongchang.com/api/v1/knowledge/claims/503650MCP
get_claim(id=503650)