context: Learn is employed for mature. Learn is defined as elementary origin of knowledge. Penknife is not employed for draw straight line. Quiet is not employed for get checkmate. College is employed for learn. Quiet is employed for think. Quiet is not employed for lay on while at beach. Umberella is employed for draw straight line. Discover truth is employed for learn. Penknife is not employed for mature. Quiet is situated at library. Think is employed for discover truth.
text: Discover truth is not employed for mature.