Information:  - An essay is, generally, a piece of writing that gives the author's own argument  but the definition is vague, overlapping with those of an article, a pamphlet, and a short story. Essays have traditionally been sub-classified as formal and informal. Formal essays are characterized by "serious purpose, dignity, logical organization, length," whereas the informal essay is characterized by "the personal element (self-revelation, individual tastes and experiences, confidential manner), humor, graceful style, rambling structure, unconventionality or novelty of theme," etc.  - Walter Kirn (born August 3, 1962) is an American novelist, literary critic, and essayist. He is the author of eight books, most notably "Up in the Air", which was made into a movie starring George Clooney.  - George Timothy Clooney (born May 6, 1961) is an American actor, filmmaker, and activist. He has received three Golden Globe Awards for his work as an actor and two Academy Awards, one for acting and the other for producing.  - Thumbsucker is a 1999 novel by Walter Kirn . It was adapted into a film of the same name by Mike Mills in 2005 .    Given the information above, choose from the list below the object entity that exhibits the relation 'followed by' with the subject 'thumbsucker '.  Choices: - 1961  - 1962  - 6  - a  - air  - as  - august  - classified  - dignity  - eight  - george  - in the air  - is  - may  - novelty  - one  - s  - the definition  - theme  - three  - two  - up in the air  - work
Answer:
up in the air