premise: Mamata Banerjee is a Australian politician.
hypothesis: Mamata Banerjee ( [ mɔmɔt̪a bɔnd̪d̪oˈpad̪ʱˈae̯ ] ( Bengali - মমতা বন্দপাধ্যায় ) also known as Didi was born 5 January 1955 ) is an Indian politician who has been Chief Minister of West Bengal since 2011 .