True, The sentence makes sense if your translating it to English Hope this helps
What does josefina and manuel do?
Answer:
el 52 es un culonque mama
La muralista <span>habrían</span> mejorado el aspecto de esta pared si hubiera pintado niños jugando.
'The muralist would've improved the aspect of this wall if she/he would have painted children playing.' - translation in my own words.
I hope this helped - Maria S.