In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Q: Passage: Shortly before 2012 LegCo elections, Johnny Mak, the party's sole District Councillor, and his group Democratic Alliance broke apart from the People Power, as Johnny Mak wanted to lead a candidate list in the New Territories West. The party gained more than ten percent of the vote in the geographical constituency and won three seats. Wong Yuk-man and Albert Chan were re-elected to the Legislative Council, with Ray Chan newly elected in the New Territories East as the first openly gay legislator in Hong Kong history. Chairman Christopher Lau Gar-hung failed to win a seat with Stephen Shiu in Hong Kong Island. Wong Yuk-man's protege Wong Yeung-tat also failed to win a seat where he contested against the LSD chairman Andrew To, who Wong Yuk-man split with a year ago. The People Power fiercely attacked the Democratic Party candidates during the campaign and called for blank vote in the District Council (Second) constituency created under the 2010 constitutional reform package and not voting for the Democratic Party and the Association for Democracy and People's Livelihood (ADPL). Wong Yeung-tat left and formed the Civic Passion.
Link Information: none Answer: none
A:
How many people live on the island that Christopher Lau Gar-hung failed to win a seat in?