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.

GM Pioneers Trackers have been around since 1984, when General Motors Co. introduced a class of stock linked to its former computer-services unit, Electronic Data Systems Corp. A second class, for its Hughes Electronics Corp. satellite unit, came out the following year.

Answer: parent_organization: Hughes Electronics, General Motors