@prefix a: <http://foo/a#> .
@prefix : <#> .

:test :comment "String tests".

a:b a:p01 "123".
a:b a:p02 "123-\"-\'-quote".
a:b a:p03 '123-\"-\'-quote'.

a:b a:p10 """Triple double-quoted string with single quotes (" ') and newline
in it""".
a:b a:p11 '''Triple single-quoted string with single quotes (" ') and newline 
in it'''.