input: Lift your pelvis straight up towards the ceiling without swinging your legs
fixed: Lift your pelvis straight up towards the ceiling without swinging your legs.

input: Whole mankind saw the elephant
fixed: Whole mankind saw the elephant.

input: General advice on disease prevention and a healthy lifestyle can be found in the library article General Advice for both the healthy and the sick
fixed: General advice on disease prevention and a healthy lifestyle can be found in the library article "General Advice - for both the healthy and the sick"

input: However the translations performed by computer today are not accurate enough
fixed:
However, the translations performed by computer today are not accurate enough.