Assertion: hop | /r/Desires | boiling
Facets:
value: for is called isomerisation
type: PURPOSE
value: for a long time
type: TEMPORAL
Source sentences:
text: What probably kept the usefulness of hops from being discovered for so long is that the bittering, preserving resins in hop cones are not very soluble, and the hops need boiling for a long time, around 90 minutes, for what is called isomerisation – the physical change in the hop acids to a more soluble form of the molecule – to take place.