Using a simple measure of association between properties and queries, explained in detail later in this paper, one can rank each property and obtain the following three highest scoring properties for explaining the similarity of these terms: {they are products, they can be imported, they can be exported} Even though can be imported and can be exported are highly ranked explanations, taken jointly, once we know one the other does not offer much more information since most things that can be imported can also be exported.
there is a large overlap in information between the two properties.