Assertion: penguin | /r/PartOf | the family
Facets:
Source sentences:
text: Penguins belong to the family Spheniscidae and are classified as aquatic birds that have been in existence for the past 50 million years.
text: Penguins are merely black and white, seabirds that cannot fly and belong to the family Spheniscidae, which is commonly found in the Antarctic; however, there are many species that live more temperate regions as well.
text: However, it is generally agreed that penguins belong to the Order Sphenisciformes and the family Spheniscidae.