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:A mob boss plots to kidnap Leo 's son and ex-wife , who are headed to New York . Sentence 2:Meanwhile , Cat has to help Gregg prove himself innocent of a brutal crime .
meanwhile

Sentence 1:Barton 's behaviour appeared to improve after his participation at the Sporting Chance Clinic . Sentence 2:However , on 30 September 2006 , television cameras captured Barton exposing his backside to Everton fans , following City 's injury - time equaliser in a match at Goodison Park .
however

Sentence 1:Thus , formation of ROS can be promoted . Sentence 2:Moreover , arsenic could cause oxidative stress by depleting the cell 's antioxidants , especially the ones containing thiol groups .

moreover