rdf('#JohnWeight', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#value', literal('200')).
rdf('#JohnWeight', 'http://www.nist.gov/units/units', 'http://www.nist.gov/units/Pounds').
rdf('John_Smith', 'http://www.nist.gov/units/weight', '#JohnWeight').