Original sentence: Activists raising money for the Fusion Energy Foundation became known in the 1980s as "the kooks at the airport" who solicited money using "Nuke Jane Fonda" posters.Other placards  said "Nuclear plants are built better than Jane Fonda", and "Feed Jane Fonda to the Whales"
Edited sentence: Activists raising money for the Fusion Energy Foundation had placards in the 1980s that said "Nuclear plants are built better than Jane Fonda", and "Feed Jane Fonda to the Whales"