Problem: Is "He opened his hands when the wind stopped." true if "Fred covered his eyes with his hands, because the wind was blowing sand around. He opened them when the wind stopped."?
Answer: no

Problem: Is "Mr. Schmidt's work was beautiful." true 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."?
Answer: yes

Problem: Is "The scientists began two years ago." true if "The scientists are studying three species of fish that have recently been found living in the Indian Ocean. They began two years ago."?
Answer: yes

Problem: Is "The sack of potatoes had to be moved first." true if "The sack of potatoes had been placed above the bag of flour, so it had to be moved first."?
Answer:
yes