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:The outer face of the pubic apron is somewhat concave , and the bottom end is expanded forwards and backwards to about 16 % the length of the entire bone . Sentence 2:Finally , the expanded obturator plate of the ischium bears a groove on its side .

Ex Output:
finally


Ex Input:
Sentence 1:The demolition of the tracks and the railway buildings at the old terminus were completed in 1971 . Sentence 2:However , as a result of the relocation , the station lost its importance .

Ex Output:
however


Ex Input:
Sentence 1:since a larger value ( the energy released in the reaction ) is subtracted from a smaller value ( the energy used for the reaction ) . Sentence 2:For example , when hydrogen burns :

Ex Output:

for example