Valerie Ann Brisco-Hooks (born July 6, 1960 in Greenwood, Mississippi) won three gold medals as an Olympic track and field athlete at the 1984 Olympics at Los Angeles, California, making her the first Olympian to win gold medals in both the 200- and 400-meter races at a single Olympics.
Valerie Ann Brisco-Hooks competed against only women when she won the 200-meter race at the 1984 Olympics.
Olympic 200m races are run against only same-sex competitors.  So Valerie Ann Brisco-Hooks, identified as female, only would have raced other females at the Olympics.  The agent likely doesn't understand how competition works in track and field, and since the paragraph didn't explicitly state her competition, it didn't know.
( z1 compete :ARG0 ( z2 person :name ( z3 name :op "Valerie" :op "Ann" :op "Brisco-Hooks" ) ) :ARG1 ( z4 woman :mod ( z5 only ) ) :time ( z6 win :ARG0 z2 :ARG1 ( z7 race :ARG3 ( z8 distance-quantity :quant 200 :unit ( z9 meter ) ) ) :ARG2 ( z10 game :name ( z11 name :op 1984 :op "Olympics" ) ) ) )