Assertion: normal rain | /r/HasProperty | acidic
Facets:
value: slightly
type: DEGREE
value: with a ph of 5.6
type: OTHER
Source sentences:
text: Normal rain has a pH of about 5.6; it is slightly acidic because carbon dioxide (CO 2 ) dissolves into it forming weak carbonic acid.
text: Normal rain is slightly acidic, with a pH of 5.6, while acid rain generally has a pH between 4.2 and 4.4.