Barbro Martinsson (born 16 August 1935) is a former Swedish cross country skier who competed during the 1960s. Born in Valbo, she won two silver medals in the 3 x 5 km at the 1964 Winter Olympics and the 1968 Winter Olympics. Martinsson finished 4th in the 1968 Winter Olympics in both 5 km and 10 km.
In the 1968 Winter Olympics, Barbro Martinsson won two gold medals in the 3 x 5 km race.
A: No

Enrique Leff (born Mexico, 1946) is a Mexican economist, who defines himself today as an environmental sociologist and environmentalist. He has written 25 books and 180 articles on political ecology, environmental sociology, environmental economics, environmental epistemology and environmental education. He is regarded as one of the key environmental thinkers in Latin America.
Enrique Leff was born in the 20th century
A: Yes

Sterling Knight (born March 5, 1989) is an American actor and musician. He is best known for playing the roles as Alex in "17 Again", Chad Dylan Cooper in Disney Channel Original Series "Sonny with a Chance" and its spinoff "So Random!", Zander Carlson in "Melissa & Joey", and Christopher Wilde in the Disney Channel Original Movie "Starstruck".
Sterling Knight knew the actor who played Sonny on "Sonny with a Chance".
A:
It's impossible to say