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:In trace fossil nomenclature a Latin binomial name is used , just as in animal and plant taxonomy , with a genus and specific epithet . Sentence 2:However , the binomial names are not linked to an organism , but rather just a trace fossil .

Ex Output:
however


Ex Input:
Sentence 1:A subsequent report focused on biosecurity , especially the so - called dual - use challenge . Sentence 2:For example , while synthetic biology may lead to more efficient production of medical treatments , it may also lead to synthesis or modification of harmful pathogens ( e.g. , smallpox ) .

Ex Output:
for example


Ex Input:
Sentence 1:In the season 1989 - 1990 he promoted lower league side Constructorul Craiova to Divizia B. In 1990 - 1993 he worked as director of the Center for Children and Youth Universitatea Craiova . Sentence 2:Then , with the Egyptian club won the Hosni Mubarak Cup .

Ex Output:

then