People waiting for something in front of a house .
The people are waiting outside .
People waiting for something in front of a house.
The people are waiting outside.
In order to be in front of something, the people must be outside of it.  Therefore, it makes sense that the people in front of a house are outside of the house.
In order to be in front of something , the people must be outside of it . Therefore , it makes sense that the people in front of a house are outside of the house .