Seewoosagur Ramgoolam -  Sir Seewoosagur Ramgoolam (SSR) GCMG LRCP MRCS often referred to as Chacha Ramgoolam was a Mauritian politician statesman and philanthropist. He was a leader in the Mauritian independence movement and served as the first Chief Minister and Prime Minister of Mauritius as well as its sixth Governor General. He was the Chairperson of the Organisation of African Unity from 1976 to 1977. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Office Holder

Tabernaemontana polyneura -  Tabernaemontana polyneura is a species of plant in the Apocynaceae family. It is endemic to Malaysia. It is threatened by habitat loss. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Plant

Oregon Convention Center -  The Oregon Convention Center is a convention center in Portland Oregon. Opened in 1990 it located on the east side of the Willamette River in the Lloyd District neighborhood. It is best known for the twin spire towers which provide light into the building's interior and for housing the world's largest Foucault Pendulum. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Building