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:This is in contrast to waterfall models where the process is often highly controlled and minor changes to the system require significant revision of supporting documentation . Sentence 2:However , this does not justify completely doing without any analysis or design at all .

Ex Output:
however


Ex Input:
Sentence 1:Nonetheless , technological innovation continued . Sentence 2:For example , AT&T commissioned the first experimental communications satellite , Telstar I in 1962 .

Ex Output:
for example


Ex Input:
Sentence 1:Other types of double surnames are not accepted by German name law . Sentence 2:However , exceptions are made for immigrants and for marriages where the double surname already was the official name of one partner before marriage .

Ex Output:

however