Problem: If "John couldn't see the stage with Billy in front of him because he is so tall.", does it follow that "John is so tall."?

Answer: no

Problem: If "Sam pulled up a chair to the piano, but it was broken, so he had to sing instead.", does it follow that "The chair was broken, so he had to sing instead."?

Answer: no

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

Answer: no

Problem: If "My meeting started at 4:00 and I needed to catch the train at 4:30, so there wasn't much time. Luckily, it was short, so it worked out.", does it follow that "The train was short, so it worked out."?

Answer:
no