Add punctuation: This makes the house keep the heat so the heat does not get lost
A: This makes the house keep the heat so the heat does not get lost.

Add punctuation: You want to create rich graphical interfaces and complex but here it can quickly become a challenge
A: You want to create rich graphical interfaces and complex, but here, it can quickly become a challenge.

Add punctuation: Facilities in Borovets Hills hotel Borovets
A:
Facilities in Borovets Hills hotel - Borovets