About: http://webisa.webdatacommons.org/200509468

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The number of different types of particles are meaningful in quantum field theory, because the total amplitude is the sum of the different ways, and if there are different particles which contribute, it gets added up.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com