What is the relationship between 'Stratasys' and '3D printing' in the context of the input sentence.
Options: location of formation, product/material produced, position held, creator

Survey Reveals 3D Printing’s Imminent Impact on Manufacturing Stratasys Direct Manufacturing sampled 700 professional users of 3D printing to identify current and future trends Stratasys Direct Manufacturing 20 hours ago  .
product/material produced