question: in 1994 robinson (now aged 83!) published two figures in the hyperbolic plane which presents some properties of tilings of the hyperbolic plane by equilateral triangles having angles of size 2/n, where n = 7 or n = 9.
Capitalize this past sentence correctly.
A: In 1994 Robinson (now aged 83!) published Two figures in the hyperbolic plane which presents some properties of tilings of the hyperbolic plane by equilateral triangles having angles of size 2/n, where n = 7 or n = 9.

question: in the same year, caccioppoli became picone's assistant.
Capitalize this past sentence correctly.
A: In the same year, Caccioppoli became Picone's assistant.

question: let us set the scene and put her work in context.
Capitalize this past sentence correctly.
A: Let us set the scene and put her work in context.