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 universe was created a trillionths of a second after the Big Bang. 
( z1 create :ARG1 ( z2 universe ) :time ( z3 after :op ( z4 event :name ( z5 name :op "Big" :op "Bang" ) ) :quant ( z6 product-of :op "1/3" :op ( z7 temporal-quantity :quant-of ( z8 second ) ) ) ) )