Use "building complex" in a sentence

1. The island is very well guarded and even if you were to get out of this building complex you would be tracked down by the guard dogs and security staff

2. the other side of the road, there was the building complex

3. Building complex at a principle of compensation is the safest

4. In the absence of a market price, traders resorted to building complex models with many moving parts (if that sounds a lot like guessing, you’re not wrong), and many of these models gave very misleading values for these instruments