scalar key ('key1')
: (':')
whitespace (' ')
& ('&')
anchor ('an')
Eol ('\n')
indent ('  ')
scalar key ('k1')
: (':')
whitespace (' ')
text ('v1')
Eol ('\n')
indent ('  ')
scalar key ('k2')
: (':')
whitespace (' ')
text ('v2')
Eol ('\n')
scalar key ('key2')
: (':')
whitespace (' ')
* ('*')
alias ('an')