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.

Ex Input:
Sentence 1:Archeops flew for the first time in Trapani ( Sicily ) with four -- hours integration time . Sentence 2:Then , the upgraded instrument was launched three times from the Esrange base near Kiruna ( Sweden ) by the CNES during 2 consecutive Winter seasons ( 2001 and 2002 ) .

Ex Output:
then


Ex Input:
Sentence 1:The manoeuvre began auspiciously when Potter 's militia dispersed in the face of Grant 's column . Sentence 2:However , the capture of two of Grey 's soldiers warned Lafayette of his danger .

Ex Output:
however


Ex Input:
Sentence 1:A network that contains n different kinds of elements . Sentence 2:For instance , a network consisting solely of LC elements is a 2 - element - kind network .

Ex Output:

for instance