Erin jumped and clapped at the dance performed by Betty.  
OPTIONS:
- Erin was quite the fan.
- Betty was quite the fan.
Erin was quite the fan.

Carrie was a teacher of math and Elena was their student, so 
OPTIONS:
- Carrie got lots of homework.
- Elena got lots of homework.
Elena got lots of homework.

Logan drank more milk daily than Lawrence because 
OPTIONS:
- Logan had a severe case of lactose intolerance.
- Lawrence had a severe case of lactose intolerance.
Lawrence had a severe case of lactose intolerance.