create implication air_tank (503) -> gas_tank (235)
create implication helium_tank (249) -> gas_tank (235)
create implication oxygen_tank (311) -> gas_tank (235)
create implication hydrogen_tank (0) -> gas_tank (235)
create alias gastank (0) -> gas_tank (235)
create alias airtank (22) -> air_tank (503)
create alias hellium_tank (0) -> helium_tank (249)
create alias helluim_tank (0) -> helium_tank (249)
create alias hueluim_tank (0) -> helium_tank (249)