Allen was renowned for his skill at scratch-building and creating scenery, and he pioneered the technique of weathering his models to make them look old and more realistic.
scratch-building and creating scenery were skills that Allen wasnt good at.
( z1 skill :domain ( z2 and :op ( z3 build :ARG1-of ( z4 scratch ) ) :op ( z5 create :ARG1 ( z6 scenery ) ) ) :ARG1-of ( z7 good :polarity - :ARG2 ( z8 person :name ( z9 name :op "Allen" ) ) ) )