I think I might have worked it out.
: match "examine bottle" {
: if (adjective1_is "clear") {
: print "It's clear.";
: done;
}
: if (adjective1_is "green") {
:print "It's green.";
: done;
}
: if (adjective1_is "blue") {
:print "It's blue.";
: done;
}
}