고1 모의고사 어법 문제에서 to prevent 앞부분이 궁금해요

다음 문장에서 and 뒤의 to prevent 앞에 생략된 말이 있나요?
“The parents found the couple together on a beach one day, and to prevent them from being together, one of the families moved to the mountains, separating the young couple forever.”