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 Q]: Sentence 1:The mechanisms for infection , proliferation , and persistence of a virus in cells of the host are crucial for its survival . Sentence 2:For example , some diseases such as measles employ a strategy whereby it must spread to a series of hosts .
[EX A]: for example

[EX Q]: Sentence 1:The excavated specimen was most likely a young adult . Sentence 2:However , based on the beginning of ossification of the mid-cervical arch with the centrum , it was near maturity .
[EX A]: however

[EX Q]: Sentence 1:He pretends to go along with her . Sentence 2:Meanwhile , O'Brien plots with Sisko to escape the station and return with reinforcements to overthrow Kira .
[EX A]:
meanwhile