You can put a !-sign in front of the statement to act as a NOT. You can read 'the train' as 'the cart' if [cart] is used on the first line. Statements with the format name@<array> are called array statements and can operate on multiple of a certain property. For example, i@wood operates on the items in the train, and checks if there is wood in there. For multiple items, delimit using a semicolon ( ; ), for example ed@north;south will match trains moving towards north or south only.