Hey Christopher,
There is currently no element that can do what you are trying achieve but you can write a custom Javascript for it just like this:
(function($){
$("#eacs-interactive-promo-1459").on("click", function(){
// do the actions here.
});
})(jQuery);
The code above will keep track of the click even for the first speaker through its ID.

As you can see, each of the speaker item has an ID assigned to it so you can make use of the IDs of each item and add a click even listener just like the code above then under /// do the actions here. write the codes to reveal the text box related to the item clicked. You may assign an ID to the textboxes and target them using their ID.
As this is something that requires customization, this goes beyond the scope of our support but you may check these links as guides:
Jquery ON: http://api.jquery.com/on/
http://api.jquery.com/css/
Hope this helps.