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:The collector current does not remain constant with variation in temperature or power supply voltage . Sentence 2:Therefore , the operating point is unstable .
[EX A]: therefore

[EX Q]: Sentence 1:Fouling is ubiquitous and generates tremendous operational losses , not unlike corrosion . Sentence 2:For example , one estimate puts the losses due to fouling of heat exchangers in industrialized nations to be about 0.25 % of their GDP .
[EX A]: for example

[EX Q]: Sentence 1:Brahma Kumaris recommend a specific lifestyle in order achieve greater control over physical senses . Sentence 2:However , many participate in a casual way , electing to adopt whichever beliefs and lifestyle disciplines in the following list they wish :
[EX A]:
however