Assertion: country music's artist | /r/CapableOf | achieve 50 #1 songs
Facets:
value: on a billboard chart
type: LOCATION
Source sentences:
text: Madonna added another record to her legendary career by becoming the first artist to achieve 50 #1 songs on a Billboard chart, more specifically in the Dance Club Songs chart, pulling ahead of runner-up George Strait who has 44 #1 songs on the Hot Country Songs chart.