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.

Ex Input:
Sentence 1:The diagnosis of RA was formerly based on detection of rheumatoid factor ( RF ) . Sentence 2:However , RF is also associated with other autoimmune diseases .

Ex Output:
however


Ex Input:
Sentence 1:The fertility of their hybrid has given rise to speculation that the dromedary and the Bactrian camel should be merged into a single species with two varieties . Sentence 2:However , a 1994 analysis of the mitochondrial cytochrome b gene showed the species display 10.3 % divergence in their sequences .

Ex Output:
however


Ex Input:
Sentence 1:By 1957 , he was head of their history department . Sentence 2:Eventually , Harrison became chair of the College of Social Sciences at West Texas .

Ex Output:

eventually