Assertion: backstroke | /r/HasProperty | dated to ancient times
Facets:
Source sentences:
text: The backstroke can be dated back to ancient times, but it became popular after American Olympian Henry Hebner took the gold in the 100 m backstroke in the 1912 Olympics.
text: The backstroke can be dated back to ancient times, but it became popular after American Olympian Henry Hebner took the gold in the 100 m backstroke in the 1912 Olympics.