sentence: Cynthia wanted to buy the children some toys, but Jennifer said not to. 
complete: Jennifer thought toys were a big waste of spending money.

sentence: Nelson didn't really care to go on boat rides but Derrick loved a cruise around the bay. 
complete: Nelson had a problem with seasickness.

sentence: Randy's cough has been around a while, but Nelson doesn't have one, so 
complete:
Nelson is clearly healthy.