sentence: When the person started choking, Betty but not Katrina performed the Heimlich maneuver because OPTIONS:
- Betty had very little knowledge of first aid.
- Katrina had very little knowledge of first aid.
complete: Katrina had very little knowledge of first aid.

sentence: The hunters had to wear the bear fur coats in the valley, but didn't need them on the mountain, since the OPTIONS:
- valley was so warm.
- mountain was so warm.
complete: mountain was so warm.

sentence: Nick complained to Derrick because OPTIONS:
- Nick was frustrated with being in a failing relationship for this long.
- Derrick was frustrated with being in a failing relationship for this long.
complete:
Nick was frustrated with being in a failing relationship for this long.