Question: Who is the director of Attack on Titan?
Sentence (from "Attack on Titan: Smoke Signal of Fight Back"): Attack on Titan: Smoke Signal of Fight Back (進撃の巨人 ATTACK ON TITAN 反撃の狼煙) is a live-action web miniseries, a spin-off of the Attack on Titan film directed by Shinji Higuchi.
Relevant evidence: Yes