None of these people took the reading. The record of each shows the shape.
Miriam Makeba (1932 to 2008)
Miriam Makeba left South Africa in 1959, spoke against apartheid at the United Nations in 1963, the year her citizenship was taken away, and went on singing and speaking out against it abroad until she returned in 1990. Thirty-one years of carrying one cause from stage to stage, in front of audiences who could take it up, show the shape from outside.
Source: sahistory.org.za
Savitribai Phule (1831 to 1897)
In 1848 Savitribai Phule and her husband Jyotirao opened a school for girls in Pune, and she kept teaching while opponents threw stones and dung at her. The couple went on to open eighteen schools. One cause taken into school after school for decades, in full view and against open hostility, shows the shape from outside.
Source: en.wikipedia.org