Utilize the input text as a context reference, choose the right relationship between 'Stratasys' and '3D printing' from the options.
Options: position held, product/material produced, location of formation, 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