You will be given a definition of a task first, then some input of the task.
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: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 ) .
Output:
then