Cemeteries do not record the cause of death or the date of death.They only record the date of internment.
You will need to order the death cert for Effie P. Cook (P. = Pearl) from the county of death clerks office in Neb.
1910 - LOOKS TO ME THAT HIS NAME WAS JAMES & NOT JOHN Name: Effie Cook Age in 1910: 8 Birth Year: 1902 Birthplace: Iowa Home in 1910: Omaha Ward 2, Douglas, Nebraska Race: White Gender: Female Relation to Head of House: Daughter Marital Status: Single Father's Name: James H Cook Father's Birthplace: Iowa Mother's Name: Anna Cook Mother's Birthplace: Iowa
James H Cook 34, IOWA - street car motorman Anna Cook 36, KY Alice Cook 10, IOWA Effie Cook 8, IOWA Walter Nichols 15, IOWA - s/son
TRY - Find a grave – FREE SITE - volunteer site all states; frequently has headstone pic
DO NOT SEARCH FOR A MARRIED WOMAN USING HER MAIDEN NAME.