Assertion: time zone | /r/HasProperty | based on gmt
Facets:
value: "ahead of gmt"
type: TEMPORAL
value: as half or quarter hours
type: TEMPORAL
Source sentences:
text: For example, time zones at sea are based on GMT.
text: Most time zones were based upon GMT, as an offset of a number of hours (and possibly half or quarter hours) "ahead of GMT" or "behind GMT".