Parsing unstructured files with JavaScript

It's ideal to have input files where the information is well-formed, that is, the number of columns and the type of its data is precise, all rows follow the same pattern, and so on. However, it is very common to find input files where the information has little or no structure or the structure doesn't follow the matrix (n rows by m columns) you expect. This is one of the situations where JavaScript can help.

Suppose that you have a file with a description of houses, which looks like the following:

... 
Property Code: MCX-011 
Status: Active 
5 bedrooms 
5 baths 
Style: Contemporary 
Basement 
Laundry room 
Fireplace 
2 car garage 
Central air conditioning 
More Features: Attic, Clothes dryer, Clothes washer, Dishwasher 

Property Code: MCX-012 
4 bedrooms 
3 baths 
Fireplace 
Attached parking 
More Features: Alarm System, Eat-in Kitchen, Powder Room 

Property Code: MCX-013 
3 bedrooms 
... 

You want to compare the properties among them but it would...