Problem: Sentence: "Billy cried because Toby wouldn't share Billy's toy."; Another sentence: "Billy cried because Toby wouldn't share his toy."?
A: no

Problem: Sentence: "Mark couldn't convince him."; Another sentence: "Sid explained his theory to Mark but he couldn't convince him."?
A: no

Problem: Sentence: "The chair was broken, so he had to stand instead."; Another sentence: "Sam pulled up a chair to the piano, but it was broken, so he had to stand instead."?
A:
yes