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.

[Q]: Sentence 1:This is supported by the fact that VLDLR is primarily expressed in the cortical plate adjacent to reelin - expressing cells , Cajal -- Retzius cells , and in the intermediate zone . Sentence 2:However , definitive evidence has not yet been found .
[A]: however

[Q]: Sentence 1:Like many universities and colleges in the United States , Stanford does not make use of hoods for bachelors . Sentence 2:Instead , bachelors use a stole bearing the university seal at graduation ceremonies .
[A]: instead

[Q]: Sentence 1:In terms of the measurement of wafers and flat panels , it is very important to place the sensor chip precisely and without any contact along the surface . Sentence 2:Therefore , the chip is integrated directly into the bearing 's surface .
[A]:
therefore