Experimenting on a raft anchored on the river Elbe, Alfred Nobel tries to make nitroglycerine safer to handle. Finds that the addition of kieselguhr turns nitroglycerine into a dough that can be kneaded, and calls it "dynamite".
Rafts are not something that can be anchored.
( z1 possible :polarity - :ARG1 ( z2 anchor :ARG1 ( z3 raft ) ) )