That theory, a concept first proposed by Albert Einstein and often reiterated by British astrophysicist Stephen Hawking, seeks to find a single set of equations that can explain all the fundamental forces in the universe: gravity, electromagnetism, and the strong and weak interactive forces among subnuclear particles.
Steven Hawking was successful in devising a grand unified theory.
Hawking was ultimately unsuccessful in devising a grand unified theory and now he is dead. The system wouldn't know this from the text.
( z1 succeed :ARG0 ( z2 person :name ( z3 name :op "Steven" :op "Hawking" ) ) :ARG1 ( z4 devise :ARG0 z2 :ARG1 ( z5 theory :ARG1-of ( z6 unify ) :mod ( z7 grand ) ) ) )