Joseph Aspdin
Table:
Joseph Aspdin

Born	(1778-12-25)December 25, 1778

Leeds, England

Died	March 20, 1855(1855-03-20) (aged 76)

Wakefield, England

Scientific career
Fields	British mason, bricklayer and inventor of Portland cement

Looking at the table, determine whether the statement is entailed, neutral, or refuted. Return the result as JSON: {"answer": "YOUR ANSWER"}.

Statement: Joseph Aspdin was an American inventor.

answer: refuted