A 1987 notebook excerpt of the sculptor observes: The volume of the shadow is defined by both the object interrupting 
(A 1987 notebook excerpt of the sculptor; observes; The volume of the shadow is defined by both the object interrupting) Context(A 1987 notebook excerpt of the sculptor observes,List([0, 48))):(The volume of the shadow; is defined; by both the object interrupting)
A 1987 notebook excerpt of the sculptor observes,List([0, 48))
A 1987 notebook excerpt of the sculptor The volume of the shadow
observes is defined
The volume of the shadow is defined by both the object interrupting
by both the object interrupting