Assertion: concerto's form | /r/HasProperty | non-standardized
Facets:
Source sentences:
text: Thus a 'symphonic concert' (using the English term) could only mean a performance by a group of music masters, either playing classical music or popular; unless those words were used for some 'pre-baroque' period (before 1600), when a 'concerto' could have a non-standardized form, and 'sinfonia' meant other type of composition, generally for just one soloist or a small group of similar instruments.