Problem: If "Fred watched TV while George went out to buy groceries. After an hour he got back.", does it follow that "George got back."?

Answer: yes


Problem: If "Lionel is holding captive a scientist, Dr. Vardi, who has invented a device that turns animals invisible; Lionel plans to use it on Geoffrey and send him to steal nuclear material from an army vault.", does it follow that "Lionel plans to use it on Geoffrey and send Geoffrey to steal nuclear material from an army vault."?

Answer: yes


Problem: If "Bill passed the gameboy to John because his turn was over.", does it follow that "John's turn was over."?

Answer: no


Problem: If "I put the cake away in the refrigerator. It has a lot of leftovers in it.", does it follow that "The cake has a lot of leftovers in it."?

Answer:
no