He gets only two-thirds of basic education in German (4)
I believe the answer is:
herr
This could be a double definition.
'he gets only two-thirds of basic education' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'german' is the second definition.
(German equivalent to Mr)
'in' acts as a link.
Can you help me to learn more?
(Other definitions for herr that I've seen before include "Mister in German" , "German man's title" , "European guy" , "A German gentleman" , "Form of address for German male" .)