# data[].attributes.headline
they are numbers that don't have variables

# data[].attributes.subject
they are numbers that don't have variables

# data[].attributes.headline
the numbers that have the same variables 

# data[].attributes.subject
the numbers that have the same variables 

# data[].attributes.headline
they are numbers that have the same variables and that don't have variables like 5y and 4y are like terms 

# data[].attributes.subject
they are numbers that have the same variables and that don't have variables like 5y and 4y are like terms 

# data[].attributes.body
numbers and letters