Sentence:  We went into Mrs. Monmouth 's library , which had low bookshelves all along the walls , and above them a Modigliani portrait , a Jackson Pollock twelve feet <WSD>long</WSD> , and a gorgeous Miro with a yellow background , that looked like an inscription from a Martian tomb . 
Meaning of the word marked with <WSD> tags:  primarily spatial sense; of relatively great or greater than average spatial extension or extension as specified