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:Everyone runs in terror and several shots are fired in a vain attempt to stop the killing . Sentence 2:However , several times throughout the episode , Pepe Lucho manages to catch up again to the protagonist , causing more terror .

Ex Output:
however


Ex Input:
Sentence 1:The Fe ( II ) - O-O - BH4 bridge is subsequently formed . Sentence 2:On the other hand , formation of this bridge has been modeled assuming that BH4 is located in iron 's first coordination shell and that the iron is not coordinated to any water molecules .

Ex Output:
on the other hand


Ex Input:
Sentence 1:Alginate is used in dental circumstances when less accuracy is required . Sentence 2:For example , this includes the creation of study casts to plan dental cases and design prosthesis , and also to create the primary and working impressions for denture construction .

Ex Output:

for example