Assertion: lake | /r/HasProperty | ice-free
Facets:
value: on april
type: TEMPORAL
value: completely
type: DEGREE
Source sentences:
text: This can be observed for Ice Lake by comparing temperature and oxygen profiles from March 5, 1998 (still frozen), April 18, 1998 (the lake was completely ice-free on April 11, 1998), and April 30, 1998.