Task: Discourse Connective Identification
Input (English): Sentence 1:It is said that this tank is to be one of the sixteen large reservoirs built by King Mahasen ( 277 -- 304 ) . Sentence 2:However the chronicle Mahavamsa have made a reference to this reservoir during the time of King Moggallana II ( 540 - 560 ) .
Output (English): however