create implication muffled_speech (588) -> muffled (4219)
create implication muffled_screaming (284) -> muffled (4219)
create implication muffled_moaning (228) -> muffled (4219)
create implication muffled_sounds (24) -> muffled (4219)
create alias muffled_scream (42) -> muffled_screaming (284)