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".
The river Elbe has no rafts.
( z1 have :polarity - :ARG0 ( z2 river :name ( z3 name :op "Elbe" ) ) :ARG1 ( z4 raft ) )