Assertion: pulsar | /r/HasProperty | detected since their discovery
Facets:
value: by anthony hewish
type: OTHER
value: by jocelyn bell at cambridge university
type: OTHER
value: in 1967
type: TEMPORAL
Source sentences:
text: Although over 1400 pulsars have been detected since their discovery in 1967 by Anthony Hewish and Jocelyn Bell at Cambridge University, this particular system has caused a lot of excitement.