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:However , these amounts are not extractable without mining of the host materials ( see Production and availability ) . Sentence 2:Thus , the availability of indium is fundamentally determined by the rate at which these ores are extracted , and not their absolute amount .
[EX A]: thus

[EX Q]: Sentence 1:It excludes problems with flow separation at sea level and increases efficiency of the engine in vacuum . Sentence 2:For example , application of nozzle extension for liquid rocket engine NK - 33 improves the value of specific impulse up to 15 - 20 sec for near - space conditions .
[EX A]: for example

[EX Q]: Sentence 1:Like many universities and colleges in the United States , Stanford does not make use of hoods for bachelors . Sentence 2:Instead , bachelors use a stole bearing the university seal at graduation ceremonies .
[EX A]:
instead