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.

Sentence 1:The macronuclear chromosomes are also amplified to produce a high variable copy number between the chromosomes . Sentence 2:For example , chromosome A may have 500 copies while chromosome B only has 5 copies in the macronucleus .
for example

Sentence 1:Sometimes the edifice had to be boarded up . Sentence 2:However , in 2002 , as part of the celebrations of the Queen 's Golden Jubilee , the clock tower was again restored .
however

Sentence 1:In 2014 the Royal College had more than 44,000 members worldwide , including Fellows , residents , and honorary , retired , and emeritus members . Sentence 2:However , about 90 % of certified physicians decide to become Fellows within two years of their certification .

however