Question: Which book written by an Indian born Australian adopted author was the film "Lion" based on? 

Context paragraphs:
The Harp in the South: The Harp in the South is the debut novel by New Zealand born Australian author Ruth Park.  Published in 1948, it portrays the life of a Catholic Irish Australian family living in the Sydney suburb of Surry Hills, which was at that time an inner city slum.

Frances Watts: Frances Watts is the pen-name of Ali Lavau, a Swiss born Australian author, who moved to Sydney, Australia when she was three years old.  She has studied English Literature at Macquarie University, going on to teach Australian Literature and children's literature.  After graduating with a PhD, she obtained her first job in publishing.

Anuj (singer): Anuj is an Indian born Australian pop singer.  He had three top 50 singles on the ARIA singles chart.  He is currently a member of Sydney hip hop outfit King Farook sharing lead vocal duties with Antonio Chiappetta.

Siesta (poem): "Siesta" is one of the best known poems of Shampa Sinha, the Indian born Australian poet.  The poem won First Prize in the Fifth All India Poetry Competition conducted by The Poetry Society (India) in 1993.  The poem was the second major award winning work of Shampa Sinha after she won the Best Young Poet award at the Third National Poetry Competition in 1991.

Lion (2016 film): Lion is a 2016 biographical film directed by Garth Davis (in his feature debut) and written by Luke Davies, based on the non-fiction book "A Long Way Home" by Saroo Brierley with Larry Buttrose.  The film stars Dev Patel, Rooney Mara, David Wenham and Nicole Kidman.

Catherine DeVrye: Catherine DeVrye is a Canadian born Australian author of 8 best selling non fiction books and a former Australian Executive Woman of the Year winner.

Saroo Brierley: Saroo Brierley (born 1981) is an Indian-born Australian businessman who, at age five, was accidentally separated from his biological mother.  He was adopted by an Australian couple and, 25 years later, reunited with his biological mother.  His story generated significant international media attention, especially in Australia and India.

Poor Man's Orange: Poor Man's Orange is a novel by New Zealand born Australian author Ruth Park.  Published in 1949, the book is the sequel to "The Harp in the South" and continues the story of the Darcy family, living in the Surry Hills area of Sydney.

Julian Karikalan: Julian Karikalan is an Award-winning, Indian born Australian filmmaker, known for his feature film “Love and Love Only” which is the first-ever English language film for which the most prolific film composer of Indian cinema, Maestro Ilaiyaraaja has composed original songs and the complete score.

Ruth Park: Rosina Ruth Lucia Park AM (24 August 191714 December 2010) was a New Zealand–born Australian author.  Her best known works are the novels "The Harp in the South" (1948) and "Playing Beatie Bow" (1980), and the children's radio serial "The Muddle-Headed Wombat" (1951–1970), which also spawned a book series (1962–1982).

Supporting paragraphs: Lion (2016 film) Saroo Brierley
Answer: "A Long Way Home"