Each room then had to be sound-proofed - Hale carpeted the classroom walls of their ITV room.
(Each room; to be; sound-proofed - Hale carpeted the classroom walls of their ITV room) Context(Each room to be,List([0, 24))):(sound-proofed - Hale; carpeted; the classroom walls of their ITV room)
Each room to be,List([0, 24))
Each room sound-proofed - Hale
to be carpeted
sound-proofed - Hale carpeted the classroom walls of their ITV room
the classroom walls of their ITV room