instruction:
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.
question:
Sentence 1:In the above , function ( ) can be called by different threads without any problem . Sentence 2:But , if the function is used in a reentrant interrupt handler and a second interrupt arises inside the function , the second routine will hang forever .
answer:
but

question:
Sentence 1:This design allows the vertical misalignment to be about 20 cm with a 50 % power efficiency . Sentence 2:However , the U shaped cores also require return cables which bumps up the cost of production .
answer:
however

question:
Sentence 1:One of their favorites was John Dixon , who regained his malicious streak after a few years of dormancy . Sentence 2:But John 's newly refound maliciousness started out somewhat innocently and at first was seen as being part of another new character 's maliciousness .
answer:
but