With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: Male tennis player with tattoo on left arm in position to hit the ball with onlooker sitting down. Male tennis player with tattoo on left are prepares to return a serve in a semi-final game with the already determined finalist sitting watching to see who they will play.
text_B: The finalist watches the game intently.
strengthener.