Within trillionths of a second after the Big Bang, they have reasoned, the primordial explosion - many billions of degrees hot - must have created a universe that contained equal quantities of matter and antimatter.
The Big Bang created a universe that contained equal quantities of matter and antimatter. 
( z1 create :ARG0 ( z2 event :name ( z3 name :op "Big" :op "Bang" ) ) :ARG1 ( z4 universe :ARG0-of ( z5 contain :ARG1 ( z6 and :op ( z7 matter ) :op ( z8 antimatter ) :quant ( z9 mass-quantity :ARG1-of ( z10 equal ) ) ) ) ) )