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:While the amphitheater 's capacity more than doubled , no known event warranted such an effort . Sentence 2:In fact , some evidence suggests that the population of Caesarodonum ( Tours ) had stopped growing by that time .

in fact