Assertion: trench's depth | /r/HasProperty | 35,768 to 35,856 ft
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text: The Challenger Deep is the deepest known point in the Earth's seabed hydrosphere (the oceans), with a depth of 10,902 to 10,929 m (35,768 to 35,856 ft) by direct measurement from deep-diving submersibles, remotely operated vehicles and benthic landers and (sometimes) slightly more by sonar bathymetry.