"Nom de guerre" Jolanta (15 February 1910 β 12 May 2008), was a Polish humanitarian, social worker, and nurse who served in the Polish Underground Resistance during World War II in German-occupied Warsaw.
[source: Wikipedia]
2.
She was already furious as a young woman at the constant discrimination against her Jewish friends.
As a student in social welfare at the University of Warsaw, Sendler publicly denounced the segregation of classrooms, earning her a suspension and a bad reputation.