title: NSPredicate usage with NSDictionary with keys
body: <p>How can i get back all the Water Values from NSDictionary using the NSPredicate? It should return value1 and value2 and ignore value3.</p>
  <pre><code> NSDictionary *myDictionary = [[NSDictionary alloc] initWithObjectsAndKeys:@&quot;value1&quot;, @&quot;Water&quot;, @&quot;value2&quot;, @&quot;Water&quot;,@&quot;value3&quot;, @&quot;Earth&quot; ,nil];
  </code></pre>