You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
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Question: Category: SCIENCE GRAB BAG 
Clue: A material called URhGe can be manipulated into being this, lacking electrical resistance

Answer: superconductors


Question: Category: RED ROVER, RED ROVER 
Clue: This NASA "Lab" based in Pasadena designed the rovers used on Mars

Answer: jpl


Question: Category: FACTS & FIGURES 
Clue: There are currently over 900,000 of these & the avg. American uses under 14,000; Shakespeare used 24,000

Answer:
words