try markdown in a table

app.py

@@ -86,11 +86,11 @@ def render_table(forms, lemmas, upos, xpos, feats, metadata, edges, edge_labels)
     feats = list(zip(*feats))
 
     array = [
-        ["FORMS:    "] + forms,
-        ["LEMMAS:    "] + lemmas,
-        ["UPOS:    "] + upos,
-        ["XPOS:    "] + xpos,
-        ["UFEATS:    "] + list(feats[0]),
+        ["<sup>FORMS</sup>"] + forms,
+        ["<sup>LEMMAS:</sup>"] + lemmas,
+        ["<sup>UPOS:</sup>"] + upos,
+        ["<sup>XPOS:</sup>"] + xpos,
+        ["<sup>UFEATS:</sup>"] + list(feats[0]),
         *([""] + list(row) for row in feats[1:])
     ]