Assertion: orchestra's concertmaster | /r/HasProperty | leader
Facets:
Source sentences:
text: The first violins are led by the concertmaster (leader in the UK); each of the other string sections also has a principal player (principal second violin, principal viola, principal cello and principal bass) who play the orchestral solos for the section, lead entrances and, in some cases, determine the bowings for the section (the concertmaster/leader may set the bowings for all strings, or just for the upper strings).