Sieve question -- BODY contains

[Su Li]

Hi,

In Sieve I saw a lot of "header :contains ...". I wonder, if a user needs to do some 
filtering when 'body contains "test filter"', is there some thing like "body" to 
replace "header"?

So I can do:

if body :contains "From"
{
   discard;
}

Thanks,

Su