관계대명사로 두 문장을 연결하는 방법 질문드려요

“The man talked all the time. I was sitting next to him on the plane.”을 관계대명사로 한 문장으로 만들려고 해요.

1) The man to whom I was sitting next on the plane talked all the time.
2) The man next to whom I was sitting on the plane talked all the time.

둘 중 어느 문장이 맞나요?