Assertion: wren's egg | /r/HasProperty | cited as usual number
Facets:
Source sentences:
text: Although 3-7 eggs may be laid with 4-5 being cited as the usual number (Harrison 1978, Oberholser 1974), studies in Arizona and New Mexico have shown the usual number to be 3 or 4 (Anderson and Anderson 1973, Marr and Raitt 1983).