TASK DEFINITION: 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.
PROBLEM: I'd retain my existing clients, take over for some of Jillian's, and be responsible for bringing in new clients.

SOLUTION: Plural

PROBLEM: He and William Hunter owned the plant Ed Browning had been working at since it first opened eight years earlier.

SOLUTION: Singular

PROBLEM: He has increased the efficiency of the Legions remarkably.

SOLUTION:
Singular