Detailed Instructions: 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.
Q: Sentence 1:Because of the variable internal sequence , the motif can not be detected . Sentence 2:However , if we could use a program to search for motifs containing a variable sequence in the middle , without counting mutations , these motifs could be discovered .
A:
however