This represents the time when fossil fuels began forming.
(This; represents; the time when fossil fuels began forming) (fossil fuels; began; forming; T:the time) Context(fossil fuels began,List([30, 48))):(fossil fuels; began forming forming; )
fossil fuels began,List([30, 48))
This fossil fuels fossil fuels
represents began began forming forming
the time when fossil fuels began forming
forming T:the time