Assertion: petrel's wingspan | /r/HasProperty | 17 to 20 cm
Facets:
Source sentences:
text: The wingspan is 17 to 20 cm (6.7 to 7.9 in), while the body length is 28 cm (11 in).
text: The wingspan is 17 to 20 cm (6.7 to 7.9 in), and the body length is 28 cm (11 in).