Add punctuation: However Winkler was not happy with the status of statistics in central Europe
A: However Winkler was not happy with the status of statistics in central Europe.

Add punctuation: If you need customer service assistance then contact us 7 8 9
A: a If you need customer service assistance, then contact us. 7 8 9

Add punctuation: Wherever the installation is Schindler has the perfect fit
A:
Wherever the installation is, Schindler has the perfect fit.