Assertion: challenger deep | /r/HasProperty | southwest of guam
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Source sentences:
text: The greatest depths are reached in Challenger Deep, a smaller steep-walled valley on the floor of the main trench southwest of Guam.
text: Cameron’s expedition, the DEEPSEA CHALLENGE , actually explored two ocean trenches: the Challenger Deep and the Sirena Deep in the Mariana Trench (both southwest of Guam), and the New Britain Trench (south of Papua New Guinea).