Given phrases that describe the relationship between two words/phrases as options, extract the word/phrase pair and the corresponding lexical relationship between them from the input text. The output format should be "relation1: word1, word2; relation2: word3, word4". Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Troy Jensen at Piper Jaffray said that the 3D printing industry is "starting to show signs of reacceleration," with the outlook for Stratasys being more positive than that for 3D Systems.

Answer: product_or_material_produced: Stratasys, 3D printing; industry: Stratasys, 3D printing