Problem: In January 1920, Tito and his wife made a long and difficult journey home to Yugoslavia where he arrived in September. Upon his return, Broz joined the Communist Party of Yugoslavia. The CPY's influence on the political life of the Kingdom of Yugoslavia was growing rapidly. In the 1920 elections the Communists won 59 seats in the parliament and became the third strongest party. Winning numerous local elections, they gained a stronghold in the second largest city of Zagreb, electing Svetozar Delic for mayor. After the assassination of Milorad Draskovic, the Yugoslav Minister of the Interior, by a young communist on 2 August 1921, the CPY was declared illegal under the Yugoslav State Security Act of 1921. During 1920 and 1921 all Communist-won mandates were nullified. Broz continued his work underground despite pressure on Communists from the government. As 1921 began he moved to Veliko Trojstvo near Bjelovar and found work as a machinist. In 1925, Broz moved to Kraljevica where he started working at a shipyard. He was elected as a union leader and a year later he led a shipyard strike. He was fired and moved to Belgrade, where he worked in a train coach factory in Smederevska Palanka. He was elected as Workers' Commissary but was fired as soon as his CPY membership was revealed. Broz then moved to Zagreb, where he was appointed secretary of Metal Workers' Union of Croatia. In 1928, he became the Zagreb Branch Secretary of the CPY. In the same year he was arrested, tried in court for his illegal communist activities, and sent to jail. During his five years at Lepoglava prison he met Mosa Pijade, who became his ideological mentor. After his release, he lived incognito and assumed numerous noms de guerre, among them "Walter" and "Tito".
How long was he in prison at Lepoglava for?
---
Answer: five years

Problem: Most mature clitellates (the group that includes earthworms and leeches) are full hermaphrodites, although in a few leech species younger adults function as males and become female at maturity. All have well-developed gonads, and all copulate. Earthworms store their partners' sperm in spermathecae ("sperm stores") and then the clitellum produces a cocoon that collects ova from the ovaries and then sperm from the spermathecae. Fertilization and development of earthworm eggs takes place in the cocoon. Leeches' eggs are fertilized in the ovaries, and then transferred to the cocoon. In all clitellates the cocoon also either produces yolk when the eggs are fertilized or nutrients while they are developing. All clitellates hatch as miniature adults rather than larvae.
What annelid group includes leeches and earthworms?
---
Answer: clitellates

Problem: A DBMS has evolved into a complex software system and its development typically requires thousands of human years of development effort.[a] Some general-purpose DBMSs such as Adabas, Oracle and DB2 have been undergoing upgrades since the 1970s. General-purpose DBMSs aim to meet the needs of as many applications as possible, which adds to the complexity. However, the fact that their development cost can be spread over a large number of users means that they are often the most cost-effective approach. However, a general-purpose DBMS is not always the optimal solution: in some cases a general-purpose DBMS may introduce unnecessary overhead. Therefore, there are many examples of systems that use special-purpose databases. A common example is an email system that performs many of the functions of a general-purpose DBMS such as the insertion and deletion of messages composed of various items of data or associating messages with a particular email address; but these functions are limited to what is required to handle email and don't provide the user with all of the functionality that would be available using a general-purpose DBMS.
Name three DBMSs that have been used since the 1970s.
---
Answer:
Adabas, Oracle and DB2