a tribute song
... that Green Day wrote a tribute song for singer Amy Winehouse following her death, despite never having met her?
... that <a href="./Green_Day" id="mwBmI" rel="mw:WikiLink" title="Green Day">Green Day</a> wrote <b id="mwBmM"><a class="mw-redirect" href="./Amy_(Green_Day_song)" id="mwBmQ" rel="mw:WikiLink" title="Amy (Green Day song)">a tribute song</a></b> for singer <a href="./Amy_Winehouse" id="mwBmU" rel="mw:WikiLink" title="Amy Winehouse">Amy Winehouse</a> following her death, despite never having met her?