Assertion: postcard | /r/HasProperty | popular
Facets:
value: because of the wide range of subjects
type: CAUSE
value: within the christmas postcard category
type: OTHER
Source sentences:
text: Postcards were popular because they were a quick and easy way for individuals to communicate with each other.
text: Within the Christmas postcard category, postcards featuring pictures of Santa Claus are a popular subset (Santas in outfits of any color other than red are particularly desirable).
text: Postcards are popular because of the wide range of subjects, with just about every subject imaginable being at some time, portrayed on a postcard.