275982
The original building code allowed for the construction of two-family houses ( two-floor apartments ) , although later on ( mid - to late 1970s ) the code was modified to allow construction of apartment complexes of up to five floors on the larger lots , with strict limits for the location and number of such apartments for each street and avenue .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None