Assertion: pyrimidine's ring | /r/MadeOf | nitrogen atoms
Facets:
value: at opposite positions in the ring
type: LOCATION
value: at the 1 and 3 positions
type: TEMPORAL
value: in thymine
type: LOCATION
Source sentences:
text: In thymine, the ring contains nitrogen atoms at the 1 and 3 positions.
text: Piperazine ( ) is an organic compound that consists of a six-membered ring containing two nitrogen atoms at opposite positions in the ring.