Task: Text Categorization
Input (English): Thomas Kuhn's The Structure of Scientific Revolutions uses the question of when this element can be said to have been "discovered" to illustrate the concept of the accumulation of anomalies. One person who discovered this element, Carl Wilhelm Scheele, presumed that it could leech phlogiston out of a substance. Its name is Greek for ""acid-former,"" and was given by Antoine Lavoisier. It was called "dephlogisticated air" by its third discoverer, Joseph Priestley. For 10 points, identify this element whose reactions with other substances were discovered to be the source of combustion.
Output (English): Science