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 Input:
Sentence 1:During the growing season , the sun shines on a vertical surface at an extreme angle such that much less light is available to crops than when they are planted on flat land . Sentence 2:Therefore , supplemental light would be required .

Ex Output:
therefore


Ex Input:
Sentence 1:Combined with other immigrant groups like Puerto Ricans , these newcomers brought the city 's population back up to six figures . Sentence 2:However , this prosperity was short - lived .

Ex Output:
however


Ex Input:
Sentence 1:Bouchard won her first match on grass by defeating Alison Riske in the second round in Eastbourne . Sentence 2:However , she was forced to retire against eventual champion Belinda Bencic in round three with an abdominal injury .

Ex Output:

however