Do not draw an edge to a date if the gap is less than a year.
Do not draw an edge to a date if the gap is less than a year.

dilawar/ncbs-minion,dilawar/ncbs-hippo,dilawar/ncbs-hippo,dilawar/ncbs-minion,dilawar/ncbs-minion,dilawar/ncbs-minion,dilawar/ncbs-hippo,dilawar/ncbs-hippo,dilawar/ncbs-hippo,dilawar/ncbs-minion