How to make thermite<br>Select your site carefully. Make sure there is nothing that can burn within four meter radius of the reaction. Check that metals with low melting points, such as lead, tin, cadmium, or zinc, aren't near your four meter radius.
Make sure there is nothing that can burn within a four millimeter radius of the reaction; beyond that point is fine, especially if there's tin.
First, the context says a four "meter" radius, while I stated "millimeter"; next, anything between 4 meters and four millimeters is still in the reaction zone, which is not "fine"; finally, it specifically advises that tin should not be within the radius, whereas I promote it as being acceptable. For all of these reasons, my statement is definitely incorrect. I think the system had difficulty because it did not pick up on the difference in metrics used, and also its algorithm probably calculated that there was enough of a mix of context terms and uncommon outside terms for it to think that what I said could go either way. 
( z1 ensure :mxde imperative :ARG0 ( z2 you ) :ARG1 ( z3 burn :ARG1 ( z4 nothing ) :ARG1-of ( z5 possible ) :location ( z6 relative-position :op ( z7 reaction ) :quant ( z8 up-to :op ( z9 distance-quantity :quant 4 :unit ( z10 millimeter ) ) ) ) ) )