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

“We needed to look beyond our factory walls to get a more complete sense of where 3D printing is headed, so we turned to those who live and breathe the technology just like we do – professional users,” said Joe Allison, CEO of Stratasys Direct Manufacturing.
product/material produced