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.

Example Input: Sentence 1:For example , some countries require a parent 's permission to marry even for adults , or forbid marrying someone of the same sex or outside of one 's religion or ethnic group . Sentence 2:Additionally , some couples prefer to have their wedding in the United States .
Example Output: additionally

Example Input: 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 .
Example Output: for example

Example Input: Sentence 1:In 1168 there is the first indication of a free aristocratic ( edelfrei ) line in Berneck with the mention of the Walpote , Uodalrich II . Sentence 2:It can therefore be assumed that there was already a noble seat here at that time .
Example Output:
therefore