TASK DEFINITION: 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.
PROBLEM: Sentence 1:All of these characteristics run contrary to the idea that fitness is defined by individual organisms attempting to selfishly reproduce . Sentence 2:However , it soon became clear that group selection was losing the battle .

SOLUTION: however

PROBLEM: Sentence 1:Official East German and Soviet histories portrayed this merger as a voluntary pooling of efforts by the socialist parties . Sentence 2:However , there is much evidence that the merger was more troubled than commonly portrayed .

SOLUTION: however

PROBLEM: Sentence 1:In January 2014 , Maytag announced a ' Generation Five ' of the Maytag Repairman , currently played by Colin Ferguson . Sentence 2:But instead of commercials showing the repairman waiting around his shop for a Maytag appliance to break , he is playing the part of the actual appliance .

SOLUTION:
but