Token from Embedded Webform

I am embedding Webforms into parent Webforms to maintain a consistent look and feel across many Forms.

At the end of the process I would like to be able to access the email.address in the embedded form to send an email to the submitter.

Is this possible?

I understand that if email_address was on the main form I could use [submission:values:email_address] in E-mail to address - Custom.

However my email_address is in an embedded Form.
I tried [submission:values:fieldset_formkey:embedded_form_formkey:email_address] but no love!

Devel on a submission shows the email is in an array:
Can I grab it some how? Or do I need to create a token (and how?).

a:12:{s:10:"salutation";s:0:"";s:10:"first_name";s:9:"Dave";s:14:"middle_initial";s:11:"G";s:9:"last_name";s:8:"Jones ";s:9:"address_1";s:5:"123 This Street";s:9:"address_2";s:3:"Apt. 4";s:4:"city";s:4:"Gotham City";s:8:"province";s:20:"Lost Province";s:11:"postal_code";s:7:"S7H 6H6";s:7:"country";s:6:"Canada";s:16:"telephone_number";s:12:"902-555-5555";s:13:"email_address";s:19:"email@notyourdadsproblem.com";}

Thanks All.