Given the task definition and input, reply with output. In this task, you are given two sentences in the English language (Sentence 1 and Sentence 2). Your task is to identify the connecting word between the two sentences.

Sentence 1:One of them asserts that prior to the Muslim invasion , Pelayo went on a pilgrimage to Jerusalem , the sacred city of Christianity . Sentence 2:However , there is no extant evidence of this .

however