Assertion: steam engine | /r/HasProperty | improved by james watt
Facets:
value: in the 1770s
type: TEMPORAL
value: much
type: DEGREE
Source sentences:
text: Steam engines were used in mine pumps starting in the early 18th century and were much improved by James Watt in the 1770s.
text: Steam engines were used in mine pumps starting in the early 18th century and were much improved by James Watt in the 1770s.