How do I display a hyperlink in an Echo Alexa card, i.e. the card that is displayed in the Alexa app after I talk to Echo? I understand its included in the response returned by the lambda function, but cannot find any documentation other than https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/providing-home-cards-for-the-amazon-alexa-app https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/handling-requests-sent-by-alexa
neither of which discuss hyperlinks. When I try something such as `google.com, the entire ahref is outputted as regular text.
Asking Alexa for restaurant recommendations displays nicely formatted Yelp data, along with links to a map and/or the Yelp page itself.