In this task you are given a sentence. You must judge whether the object of the main clause is singular(like: apple) or plural(like: apartments). Label the instances as "Singular" or "Plural" based on your judgment.
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Question: We both left our houses at the same time, and walked until we met up.

Answer: Plural


Question: Suddenly I had no reasonable argument not to ride.

Answer: Singular


Question: I opened the lid.

Answer:
Singular