Complex sentence: During his campaign, she worked as one of the "Boiler Room Girls", an affectionate nickname given to six young women whose office area was in a hot, loud, windowless location in Kennedy's Washington campaign headquarters.
Split into simpler sentences: During his campaign, she worked as one of the "Boiler Room Girls". This is an affectionate nickname given to six young women whose office area was in a hot, loud, windowless location in Kennedy's Washington campaign headquarters.