Assertion: ballpoint pen | /r/HasProperty | viewed as vast improvement
Facets:
value: due to their reliability
type: CAUSE
value: due to affordable price
type: CAUSE
value: over fountain pens
type: OTHER
Source sentences:
text: Viewed as a vast improvement over fountain pens due to their reliability and affordable price, ballpoint pens are now the most used writing instrument in the world.
text: Viewed as a vast improvement over fountain pens due to their reliability and affordable price, ballpoint pens are now the most used writing instrument in the world.