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.

MTN Nigeria subscriber base increases but revenues drop MTN Group CEO , By MTHULISI SIBANDA JOHANNESBURG, (CAJ News ) – THE MTN Group has announced a decline in revenues at its Nigerian entity during the first half of the year.

Answer: subsidiary: MTN Group, MTN Nigeria; parent_organization: MTN Nigeria, MTN Group