The maker of a promising ovarian cancer drug said, Friday, that he stopped enrolling women in a study because several patients developed gastrointestinal holes.
The maker of a promising ovarian cancer drug spoke on Sunday.
It does not mention whether he spoke on Sunday or not. the system assumes that he did not. 
( z1 speak :ARG0 ( z2 company :ARG0-of ( z3 make :ARG1 ( z4 drug :ARG0-of ( z5 promise ) :purpose ( z6 disease :name ( z7 name :op "ovarian" :op "cancer" ) ) ) ) ) :time ( z8 date-entity :weekday ( z9 sunday ) ) )