"Dead Celebrities" is the eighth episode of the thirteenth season of the American animated television series "South Park". The 189th overall episode of the series, it originally aired on Comedy Central in the United States on October 7, 2009. In the episode, Ike is haunted by the ghosts of dead celebrities until Michael Jackson, who refuses to accept death, possesses him.
"Dead Celebrities" originally aired exactly 1278 years after October 7, 731.
My statement is definitely correct because it originally aired on October 7, 2009, and 1278 + 731 = 2009. I think the system had difficulty because it cannot calculate math involving larger numbers. 
( z1 air :ARG1 ( z2 broadcast-program :name ( z3 name :op "Dead" :op "Celebrities" ) ) :mod ( z4 original ) :time ( z5 after :op ( z6 date-entity :day 7 :month 10 :year 7 :year 7 :year 7 :year 7 :year 731 ) :quant ( z7 temporal-quantity :quant 1278 :unit ( z8 year ) :mod ( z9 exact ) ) ) )