Assertion: ballpoint pen's pen | /r/CapableOf | write on leather
Facets:
value: on rough surfaces
type: LOCATION
Source sentences:
text: Trying to invent a pen which can write on leather, a tanner John J. Loud invented the first ballpoint pen and patented it in 1888 in America.
text: According to some sources, he was trying to invent a pen that can write on leather and on rough surfaces, then he comes up with the ball