Problem: If "The fish ate the worm. It was tasty.", does it follow that "The fish was tasty."?

Answer: no

Problem: If "Every day after dinner Mr. Schmidt took a long nap. Mark would let him sleep for an hour, then wake him up, scold him, and get him to work. He needed to get him to finish his work, because his work was beautiful.", does it follow that "Mr. Schmidt needed to get him to finish his work, because his work was beautiful."?

Answer: no

Problem: If "When Tatyana reached the cabin, her mother was sleeping. She was careful not to disturb her, undressing and climbing back into her berth.", does it follow that "Tatyana was careful not to disturb her, undressing and climbing back into her berth."?

Answer: yes

Problem: If "Dan had to stop Bill from toying with the injured bird. He is very cruel.", does it follow that "Bill is very cruel."?

Answer:
yes