Is it possible to send alert to an email address I get from a form? (Not the person who submits the form, but someone else)

We are having a nomination form in Marketo. So in this form, people nominate someone else, they put both their own and other people's email and name in the fields. I want to send emails to those nominees to say something like "You are nominated by XXX". How can I do this with a smart campaign? 

"Send Email" only allows me to send emails to the person who fills the form. "Send Alert" can only send to someone I know their email already. Is it possible to read the field content of the form and let me send emails to those nominees?