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:X-rays have been detected from V473 Lyrae during a survey looking for x-rays from young main sequence companions to Cepheid variables . Sentence 2:However , the x-rays in this case appear to originate from the Cepheid itself , not from the companion .
however

Sentence 1:Frank is asked to join a secret order within M.I. 9 called the League of Mata Hari . Sentence 2:However , the curious team uncovers a criminal conspiracy that runs throughout M.I. 9 .
however

Sentence 1:Instead , Constantin tries to be a good friend and help her to get over David . Sentence 2:But Judith tries the opposite and wants to make herself to David 's dream girl .

but