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 Q]: Sentence 1:Jackie goes undercover as an escort when she and Danny track down a serial killer who is murdering prostitutes in hotel rooms . Sentence 2:Meanwhile , Erin meets a potential suitor at an art gallery who shares her interests .
[EX A]: meanwhile

[EX Q]: 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 A]: for example

[EX Q]: Sentence 1:Cord blood has been studied as a treatment for diabetes . Sentence 2:However , apart from blood disorders , the use of cord blood for other diseases is not in routine clinical use and remains a major challenge for the stem cell community .
[EX A]:
however