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.
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 .
A:
for example