Assertion: english concertina | /r/HasProperty | all types of concertinas
Facets:
Source sentences:
text: Although the lessons are based on a 48 key English Concertina (Pauline de Snoo), a 30 key Anglo Concertina (Johan Verbeek) and a Crane Duet Concertina (Paul McCann), all types of concertinas can use these lessons.