Each year, the organization releases St. Louis' Eleven Most Endangered Sites to call attention to the City's most threatened landmarks.
(the organization; releases; St. Louis' Eleven Most Endangered Sites; T:Each year) (St. Louis' Eleven Most Endangered Sites; to call; attention; to the City's most threatened landmarks)
the organization St. Louis' Eleven Most Endangered Sites
releases to call
St. Louis' Eleven Most Endangered Sites T:Each year
attention to the City's most threatened landmarks