***************
start_document
***************

***************
start_selector
S1
***************

***************
property
prop1: value1
***************

***************
end_selector
S1
***************

***************
start_selector
s1, s2
***************

***************
property
color: black
***************

***************
property
background: white
***************

***************
end_selector
s1, s2
***************

***************
start_selector
s1 s2, S3>s4
***************

***************
property
prop1: value1
***************

***************
property
prop2: value2
***************

***************
end_selector
s1 s2, S3>s4
***************

***************
end_document
***************