Exceptionally, wh-signs may not appear in content interrogatives, as in the following examples.
wh
a) ix3 color
‘What color is it?’
wh
b) time
‘What time is it?’
wh
c) ix2 year
‘How old are you?’
wh
d) ix3 face ix3
‘What does it look like?’
(examples a-d recreated from Quer et al., 2005)