Problem: The relational model, first proposed in 1970 by Edgar F. Codd, departed from this tradition by insisting that applications should search for data by content, rather than by following links. The relational model employs sets of ledger-style tables, each used for a different type of entity. Only in the mid-1980s did computing hardware become powerful enough to allow the wide deployment of relational systems (DBMSs plus applications). By the early 1990s, however, relational systems dominated in all large-scale data processing applications, and as of 2015[update] they remain dominant : IBM DB2, Oracle, MySQL and Microsoft SQL Server are the top DBMS. The dominant database language, standardised SQL for the relational model, has influenced database languages for other data models.[citation needed]
Instead of using links, how was information found in a relational model?
The answer is the following: by content

Problem: Dante made Virgil his guide in Hell and the greater part of Purgatory in The Divine Comedy. Dante also mentions Virgil in De vulgari eloquentia, along with Ovid, Lucan and Statius, as one of the four regulati poetae (ii, vi, 7).
Who was the author of the Divine Comedy?
The answer is the following: Dante

Problem: India established full diplomatic ties with Israel in 1992 and has fostered a strong military, technological and cultural partnership with the country since then. According to an international opinion survey conducted in 2009 on behalf of the Israeli Foreign Ministry, India is the most pro-Israel country in the world. India is the largest customer of Israeli military equipment and Israel is the second-largest military partner of India after the Russian Federation. India is also the third-largest Asian economic partner of Israel and the two countries have military as well as extensive space technology ties. India became the top source market for Israel from Asia in 2010 with 41,000 tourist arrivals in that year. Azerbaijan is one of the few majority Muslim countries to develop bilateral strategic and economic relations with Israel. Azerbaijan supplies Israel with a substantial amount of its oil needs, and Israel has helped modernize the Armed Forces of Azerbaijan. In Africa, Ethiopia is Israel's main and closest ally in the continent due to common political, religious and security interests. Israel provides expertise to Ethiopia on irrigation projects and thousands of Ethiopian Jews (Beta Israel) live in Israel.
Israel is the second-largest military trading partner of India after who?
The answer is the following: Russian Federation

Problem: The standard connectors were designed to be robust. Because USB is hot-pluggable, the connectors would be used more frequently, and perhaps with less care, than other connectors. Many previous connector designs were fragile, specifying embedded component pins or other delicate parts that were vulnerable to bending or breaking. The electrical contacts in a USB connector are protected by an adjacent plastic tongue, and the entire connecting assembly is usually protected by an enclosing metal sheath.
Standard connectors were designed to be what?
The answer is the following:
robust