Assertion: rock | /r/HasProperty | only number
Facets:
value: for eight weeks
type: TEMPORAL
Source sentences:
text: 1955 was also the year in which Chuck Berry's hillbilly-influenced Maybellene reached high in the charts as a crossover hit, and Bill Haley and His Comets' Rock Around the Clock was not only number one for eight weeks, but was the number two record for the year.