Assertion: postcard | /r/HasProperty | cheaper route
Facets:
value: usually
type: TEMPORAL
value: than letters
type: OTHER
value: than greeting cards
type: OTHER
value: for mailing
type: PURPOSE
Source sentences:
text: They are also a cheaper route for mailing because they do not need an envelope to mail.
text: Aside from this, postcards also come in various shapes and sizes, and are actually cheaper to send than regular letters.
text: Postcards can usually be sent at cheaper rates than greeting cards and letters.