Information: - The Czech Socialist Republic ("eska socialisticka republika" in Czech; abbreviated SR) was a republic within Czechoslovakia that is the Czech Republic today. The name was used from 1 January 1969 to March 1990. - The Dissolution of Czechoslovakia, which took effect on 1 January 1993, was an event that saw the self-determined split of the federal state of Czechoslovakia into the Czech Republic and Slovakia, entities which had arisen before as the "Czech Socialist Republic" and the "Slovak Socialist Republic" in 1969 within the framework of Czechoslovak federalisation. - Czechoslovakia or Czecho-Slovakia (Czech and , "esko-Slovensko") was a sovereign state in Central Europe that existed from October 1918, when it declared its independence from the Austro-Hungarian Empire, until its peaceful dissolution into the Czech Republic and Slovakia on 1 January 1993. - The Federal Assembly ( Czech : Federalni shromazdni , Slovak : Federalne zhromazdenie ) was the federal parliament of Czechoslovakia from January 1 , 1969 to the dissolution of Czechoslovakia on December 31 , 1992 . It was Czechoslovakia 's highest legislative institution . Chapter 3 of the 1960 Constitution of Czechoslovakia recognized it as '' the supreme organ of state power and the sole statewide legislative body . '' - From 1969 to 1990, the Slovak Socialist Republic ("Slovenska socialisticka republika" in Slovak; abbreviated SSR) was the official name of that part of Czechoslovakia that is Slovakia today. The name was used from 1 January 1969 until March 1990. Given the paragraphs above, decide what entity has the relation 'start time' with '1 january 1969'.
The answer to this question is:
federal assembly