create implication vocaloid (1091) -> vocal_synth (0)
create implication utau (670) -> vocal_synth (0)
create implication voiceroid (65) -> vocal_synth (0)
create implication synthesizer_v (8) -> vocal_synth (0)
create implication voicevox (50) -> vocal_synth (0)
create implication piapro_studio (2) -> vocal_synth (0)
create implication chipspeech (1) -> vocal_synth (0)