Definition: Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Positive Example 1 -
Input: Which writer rode Devon Loch in the 1956 Grand National?
Output: dick francis

Positive Example 2 -
Input: The 1950 FIFA World Cup was held in which country?
Output: brazil

Negative Example 1 -
Input: In which US town or city were the 1932 Winter Olympics held?
Output: The 1932 Winter Olympics was hosted at Lake Placid.

Negative Example 2 -
Input: Who directed the 2010 film 127 Hours?
Output: James Cameron

Now complete the following example -
Input: What internationally recognized unit of length (though not formally defined within the International System of Units (SI)) equal to 0.1 nanometre or 1 1010 metres is often used in the natural sciences for expressing the sizes of atoms, lengths of chemical bonds and the wavelengths of electromagnetic radiation, and in technology for the dimensions of parts of integrated circuits?
Output: 

angstrom