if something is removed from something else then that something else contained that something & land has sugar removed ->  water that has salt removed contained salt  sugar land contains sugar & salt water is a kind of water -> salt water is a kind of water that contains salt salt water is a kind of water that contains salt  water that has salt removed contained salt & salt water is a kind of water that contains salt -> land that has sugar removed was sugar land water that has salt removed was salt water  land that has sugar removed was sugar land & seawater is a kind of salt water -> water that has salt removed may have been seawater water that has salt removed may have been seawater  a ocean is a sink of freshwater & if something comes from something else then that something else is a source of that something -> seawater comes from a sea seawater comes from a sea  water that has salt removed may have been seawater & freshwater runway from a ocean -> water that has salt removed may have come from a sea