```
$caml = '<Where><AND><Neq><FieldRef Name="marking" />
<Value Type="Text">Off-S</Value></Neq><Neq><FieldRef Name="marking" />
<Value Type="Text">Off</Value></Neq></AND></Where>'

```

I have this query, which doesn't return anything.
What I want is it to return all the items that are in the column `marking` that are not equal to `Off-S` and `Off`