Assertion: metric system's unit | /r/HasProperty | based on gram
Facets:
Source sentences:
text: In 1861, a committee of the British Association for Advancement of Science (BAAS) including William Thomson (later Lord Kelvin), James Clerk Maxwell and James Prescott Joule introduced the concept of a coherent system of units based on the meter, gram and second which, in 1873, was extended to include electrical units.
text: The tables below show similar units based on grams (mass) and liters (volume).