Conditional data binding with cfgrid?

I have the following:

<cfform action="action.cfm" format="flash" method="post">
    <cfformgroup type="horizontal">
   
            <cfformgroup type="page" label="Email">
                <cfgrid name="email" query="email">
                    <cfgridcolumn name="question">
                </cfgrid>       
            </cfformgroup>
           
            <cfformgroup type="page" label="Paycheck">
                <cfgrid name="paycheck" query="paycheck">
                    <cfgridcolumn name="question">
                </cfgrid>       
            </cfformgroup>

    </cfformgroup>

     <cfformgroup type="panel" label="Answer">

          <cfformitem type="html" bind="{((email.selectedItem.question == undefined) ? '' : email.selectedItem.answer
                                            (paycheck.selectedItem.question == undefined) ? '' : paycheck.selectedItem.answer)}"></cfformitem>
     </cfformgroup>

    </cfformgroup>   
</cfform>

I presume there is a syntax error in the value of the BIND attribute of the CFFORMITEM tag. In plain-English, I'm essentially trying to say (and I'm simply not experienced enough with ActionScript to know how to do this):

If a row in the cfgrid named, "email" is selected, make the value of the answer column from the email query the value of the CFFORMITEM tag. Otherwise, if there is a row in the cfgrid named, "paycheck" that has been selected, make the value of the answer colum from the paycheck query the value of the CFFORMITEM tag.

TIA