Twelve of Jupiter's moons are relatively small and seem to have been more likely captured than to have been formed in orbit around Jupiter.
 Twelve of Jupiter's moons are relatively small and were captured and not formed in orbit around Jupiter
The original statement says more likely therefore a definitive statement such as 'they were' cannot be claimed as false or true.
( z1 and :op ( z2 small :ARG2-of ( z3 relative ) :domain ( z4 moon :quant 12 :ARG1-of ( z5 include :ARG2 ( z6 moon :part-of ( z7 planet :name ( z8 name :op "Jupiter" ) ) ) ) ) ) :op ( z9 capture :ARG1 z4 ) :op ( z10 form :polarity - :ARG1 z4 :location ( z11 orbit :ARG1 z7 ) ) )