Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.
--------
Question: Sentence: 'Clarence was recently elected Chair of the Vancouver School Board in December 2007 .', Argument/Subject 1: 'board', Argument/Subject 2: 'chair'

Answer: elect

Question: Sentence: 'Yin and yang are always opposite , with yin being sweet , cold , and passive and with yang being salty , hot , and aggressive .', Argument/Subject 1: 'yang', Argument/Subject 2: 'yin'

Answer: be opposite of

Question: Sentence: 'Construction on the Landscape Plan began September 2 , 2002 .', Argument/Subject 1: 'plan', Argument/Subject 2: 'september'

Answer:
begin in