Revamp challenge formatting

content/challenges/70.md

@@ -83,13 +83,10 @@ english:
   - and a boundless blue, blue scene.
   - Suddenly, I smelt a cool breeze crossing
   - over the dead tracks blurred by heat haze.
+song:
+  japanese: "ただ[一]{いち}[度]{ど}とないあの[夏]{なつ}へ"
+youtube: D0HvoG7PbR4 
+# Official(?) translation from YouTube subtitles.
+suggester: 猛火妹紅（MochaMoko）
 date: 2022-07-19
 ---
-
-This week's challenge is from ただ[一]{いち}[度]{ど}とないあの[夏]{なつ}へ's lyrics ([YouTube](https://www.youtube.com/watch?v=D0HvoG7PbR4)):
-
-{{< youtube D0HvoG7PbR4 >}}
-
-English translation based on YouTube subtitles.
-
-*This challenge was suggested by **猛火妹紅（MochaMoko）** using the `-h suggest` command.*