NEW YORK ( TheStreet ) -- Shares of Stratasys ( SSYS - Get Report ) were falling 9.7% to $32.96 on heavy trading volume Thursday after the 3D printing company issued a light guidance for the third quarter.
In the context of the input sentence, determine the relationship between 'Stratasys' and '3D printing'.
Options: product/material produced, industry, publisher, chairperson