Input: Article: Most birds scoop water in their beaks and raise their head to let water run down the throat. Some species, especially of arid zones, belonging to the pigeon, finch, mousebird, button-quail and bustard families are capable of sucking up water without the need to tilt back their heads. Some desert birds depend on water sources and sandgrouse are particularly well known for their daily congregations at waterholes. Nesting sandgrouse and many plovers carry water to their young by wetting their belly feathers. Some birds carry water for chicks at the nest in their crop or regurgitate it along with food. The pigeon family, flamingos and penguins have adaptations to produce a nutritive fluid called crop milk that they provide to their chicks.

Now answer this question: What is crop milk?

Output: a nutritive fluid

Input: Article: The Federal War ended in 1863 with the signing of the Treaty of Coche by both the centralist government of the time and the Federal Forces. The United States of Venezuela were subsequently incorporated under a "Federation of Sovereign States" upon principles borrowed from the Articles of Confederation of the United States of America. In this Federation, each State had a "President" of its own that controlled almost every issue, even the creation of "State Armies," while the Federal Army was required to obtain presidential permission to enter any given state.

Now answer this question: When did the federal war end?

Output: 1863

Input: Article: Spielberg's film Munich, about the events following the 1972 Munich Massacre of Israeli athletes at the Olympic Games, was his second film essaying Jewish relations in the world (the first being Schindler's List). The film is based on Vengeance, a book by Canadian journalist George Jonas. It was previously adapted into the 1986 made-for-TV film Sword of Gideon. The film received strong critical praise, but underperformed at the U.S. and world box-office; it remains one of Spielberg's most controversial films to date. Munich received five Academy Awards nominations, including Best Picture, Film Editing, Original Music Score (by John Williams), Best Adapted Screenplay, and Best Director for Spielberg. It was Spielberg's sixth Best Director nomination and fifth Best Picture nomination.

Now answer this question: What book was 'Munich' based on?

Output:
Vengeance