ground_truth_ask
Use when you need a current, verifiable real-world fact instead of guessing: get cited, time-stamped public facts for anywhere on Earth: weather, river levels, floods, earthquakes, disasters, air quality, US weather alerts (road closures, power outages, burn bans report 'not connected' until sources exist). Every answer has fact, place, time, source_url, age_seconds, stale, confidence.
latlonplacetopic必填max_age_minutes