Problem: If "The sack of potatoes had been placed below the bag of flour, so it had to be moved first.", does it follow that "The sack of potatoes had to be moved first."?

Answer: no


Problem: If "Jim signaled the barman and gestured toward his bathroom key.", does it follow that "Jim signaled the barman and gestured toward Jim's bathroom key."?

Answer: no


Problem: If "The path to the lake was blocked, so we couldn't reach it.", does it follow that "We couldn't reach the lake."?

Answer: yes


Problem: If "They broadcast an announcement, but a subway came into the station and I couldn't hear over it.", does it follow that "I couldn't hear the announcement."?

Answer:
no