Silvana, J. 87, is an opera by Carl Maria von Weber, first performed in Frankfurt am Main on 16 September 1810. The libretto, by , is a reworking of an earlier, unsuccessful opera by Weber, "Das Waldmädchen ". Weber also reused music from the same piece in "Silvana".
Carl Maria von Weber ate a lot of sandwiches while creating "Silvana, J. 87". 
( z1 eat :ARG0 ( z2 person :name ( z3 name :op "Carl" :op "Maria" :op "von" :op "Weber" ) ) :ARG1 ( z4 sandwich :quant ( z5 lot ) ) :time ( z6 create :ARG0 z2 :ARG1 ( z7 publication :name ( z8 name :op "Silvana" :op "," :op 87 :op "J." :op "87" ) ) ) )