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.

Example Input: Sentence 1:This leads to a situation where the displacement through - the - thickness is not necessarily linear and where the plate thickness may change during deformation . Sentence 2:Therefore , Reissner 's theory does not invoke the plane stress condition .
Example Output: therefore

Example Input: Sentence 1:Arjun hates Nisha attending salsa classes with her friend Mojo as her partner . Sentence 2:However , he agrees to marry her .
Example Output: however

Example Input: Sentence 1:The AV receiver is classified as an audio frequency electronic amplifier . Sentence 2:But with the rapid addition of several features , AV receivers now generally have significant additional functionality .
Example Output:
but