Assertion: field day | /r/HasProperty | annual event
Facets:
value: since 1933
type: TEMPORAL
Source sentences:
text: Field Day has been an annual event since 1933, and remains the most popular event in ham radio.
text: Field Day has been an annual event since 1933, and remains the most popular event in ham radio.
text: Field Day has been an annual event since 1933, and remains the most popular event in ham radio.