TASK DEFINITION: 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.
PROBLEM: Sentence 1:This organization held its first meeting in Berlin . Sentence 2:However , it was forced underground by the British , who refused to let these German allies operate .

SOLUTION: however

PROBLEM: 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 .

SOLUTION: however

PROBLEM: Sentence 1:Most changes are minor , adding or removing only a few base pairs of DNA . Sentence 2:For example , the WS202 release of WormBase ( April 2009 ) added two base pairs to the genome sequence .

SOLUTION:
for example