Assertion: astronomer's research | /r/CapableOf | take place
Facets:
value: during world war ii
type: TEMPORAL
Source sentences:
text: At Cambridge University, where ionospheric research had taken place during World War II, J.A. Ratcliffe along with other members of the Telecommunications Research Establishment that had carried out wartime research into radar, created a radiophysics group at the university where radio wave emissions from the Sun were observed and studied.