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.
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Question: Sentence 1:Content is free of charge for professionals and others . Sentence 2:but registration is required .

Answer: but

Question: Sentence 1:He stops to help James and Melanie when their car breaks down and initially freaks James out . Sentence 2:However , in the end it is shown the families are friends as they are celebrating Thanksgiving together .

Answer: however

Question: Sentence 1:Statements about Lawrence 's descent from earlier generations of the Sanderson family appear in an article by Rev WD Sweeting . Sentence 2:However , they should be treated with caution because they do not point to documentary evidence from earlier than the 17th century .

Answer:
however