# coding=utf-8 id = 96 name = 'sister/2' slug = 'the sister relation' description = '''\
sister(X, Y)
: X
is a sister of Y
.
?- sister(vanessa, X). X = patricia.''' hint = { 'x_y_must_be_different': '''\
What if X
and Y
are the same person? Try the
following query:
?- sister(sally, Y).''', # TODO move to generic prolog/en.py 'no_hint': '''\
No hint available, sorry! Try to use thinking instead.
''', # TODO move to generic prolog/en.py 'syntax_error': '''\Your code contains syntactic mistakes. The Prolog compiler emitted the following messages:
[%=messages%]''', }