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:As the field intensity is varied , switching between its positive and negative values can occur . Sentence 2:Consequently , the material can switch from being left - handed to being right - handed , or vice versa .
Example Output: consequently

Example Input: Sentence 1:Then , at another level , a standard spinal is performed . Sentence 2:Finally , the epidural catheter is threaded through the Tuohy needle .
Example Output: finally

Example Input: Sentence 1:At first , the animals refuse to allow the humans into the manger , as they look down on them and their behavior . Sentence 2:But , the animals relent , and Mary and Joseph are allowed into the stable for the night .
Example Output:
but