Assertion: mound's side | /r/HasProperty | situated within the vertex of the foul lines
Facets:
Source sentences:
text: ; it is a 17 by 8.5 inches rectangle with an isosceles triangle of base 17 inches and equal sides of 12 inches attached to the back, in other words a square diamond 12" on a side situated within the vertex of the foul lines, with the forward triangular half subtended within a rectangle.