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.

Input: Consider Input: Sentence 1:Some women are concerned about using ART early in the pregnancy as babies are most susceptible to drug toxicities during the first trimester . Sentence 2:However , delay in ART initiation may prove less effective in reducing infection transmission .

Output: however

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

Output: finally

Input: Consider Input: Sentence 1:It is said that this tank is to be one of the sixteen large reservoirs built by King Mahasen ( 277 -- 304 ) . Sentence 2:However the chronicle Mahavamsa have made a reference to this reservoir during the time of King Moggallana II ( 540 - 560 ) .
Output: however