In this task, you are given a sentence with a missing word that can be an object, a person, and/or an action. Fill in the blank with a plausible word. Although each sentence has many correct answers, you only have to write one answer.
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Question: PersonX calls ___ to pick PersonY up

Answer: buses


Question: PersonX sets the ___ in motion

Answer: dominos


Question: PersonX sees ___ on the sidewalk

Answer:
rocks