Simple Form drop down menu, string selection

I use simple form with my rails 4 app.

I have a show page in my app with this identifier for location:

<div class="datasubtextq">Location:
        <span class="datasubtexta">
          <% if @project.scope.try(:participant).try(:location_specific) == true %>
            <%= render @project.scope.try(:participant).try(:location) %>
          <% else %>
            <%= render :text => "Remote participation sought" %>
          <% end %>
        </span>
  </div>

In my form, I ask users to select a location, as follows:

                    <%= par.input :location, label: 'Where will participants take part in this project?', label_html: {class: 'response-project'}, collection: [ "Brisbane", "Melbourne", "Sydney" ], prompt: "Choose one" %>

When I test this, I get the following error:

The partial name (Brisbane) is not a valid Ruby identifier; make sure your partial name starts with a lowercase letter or underscore, and is followed by any combination of letters, numbers and underscores.

How do I ask for the show form to reflect the location selection made in the form?

Thank you