elect</span> 'name 'city 'age
                         ,(<span style="color: #00ffff;">if</span> salaryp 'salary nil)
                         ,(<span style="color: #00ffff;">if</span> start-date-p 'start-date nil)
                         <span style="color: #98fb98; font-weight: bold;">:from</span> 'employee))))

(query (toy-example-2 t t))

((<span style="color: #cd8162;">"Jason"</span> <span style="color: #cd8162;">"New York"</span> 29 40420 #&lt;SIMPLE-DATE:DATE 01-02-1994&gt;)
 (<span style="color: #c