Complex sentence: Feldman worked for a brief period in 1956 for United Productions of America, helping writwg episodes of Gerald McBoing Boing, and was also employed to conduct research on storylines in the public domain that could potentially be adopted into cartoons.
Split into simpler sentences: Feldman worked for a brief period in 1956 for United Productions of America. Feldman helped with writing episodes of Gerald McBoing Boing, and was also employed to conduct research on storylines in the public domain that could potentially be adopted into cartoons.