Question: The summit area of Breed's Hill is the location of a monument that is how tall?
Sentence (from "Bunker Hill Monument"): The 221-foot (67 m) granite obelisk was erected between 1825 and 1843 in Charlestown, Massachusetts, with granite from nearby Quincy conveyed to the site via the purpose-built Granite Railway, followed by a trip by barge.
Relevant evidence: Yes