{if count($explanation)}
    {if isset($explanation.challengeSubscribed)}
        {"You are subscribed to this challenge."|gettext}<br />
    {/if}
    {if isset($explanation.userFollowed)}
        {"You are following this user."|gettext}<br />
    {/if}
    {if isset($explanation.postSubscribed)}
        {"You are subscribed to this idea."|gettext}
    {/if}
{else}
    <p>{"This event will no longer show in your activity feed."|gettext}</p>
{/if}