a . was missing
@@ -27,7 +27,7 @@ abstract: "This narrative explains how to read and interpret the phylogenetic tr
<!--* [Measuring differences over time](https://nextstrain.org/narratives/trees-background?n=5). -->
* [Misurare le differenze nel tempo](https://nextstrain.org/narratives/trees-background?n=5).
<!--* [Dating the start of an outbreak](https://nextstrain.org/narratives/trees-background?n=6) -->
-* [Datare l'inizio dell'epidemia](https://nextstrain.org/narratives/trees-background?n=6)
+* [Datare l'inizio dell'epidemia](https://nextstrain.org/narratives/trees-background?n=6).
<!--* [How should I interpret traits (colors) on the tree](https://nextstrain.org/narratives/trees-background?n=7)? -->
* [Come devo interperetare i tratti (colori) sull'albero](https://nextstrain.org/narratives/trees-background?n=7)?
<!--* [How does the map relate to the tree](https://nextstrain.org/narratives/trees-background?n=8)? -->
