A list item as list too..

[Ish Rattan]

An attempt to create a nested list (item itself a list).
The error message is shown below. How to make it work?

- ishwar
-----list attempt--
@NL
@LI { An Item. }                # line 15
@LI { Another Item. }
@LI {
    @RAL
    @LI { First nested item. }
    @LI { Second nested item. }
    @REL
}
@LI { Third item. }
@EL                             # line 24
----error-
lout file "sample":
    15,1: no @ItemPlace precedes this @ItemPlace&&preceding
    24,1: no @EndListPlace precedes this @EndListPlace&&preceding
----