You will be given a definition of a task first, then some input of the task.
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.

Sentence 1:Having left a deep impression on each other , they made a promise to meet again . Sentence 2:However , Liang'er loses her memory through an accident .
Output:
however