Information: - The Milan Metro Line 2 ( Linea Due in Italian ) , is a subway line serving Milan , Italy , operated by ATM and part of the Milan Metro . It is also called Green Line , ( Linea Verde in Italian ) , as it is visually identified by green signs . The line runs from the southern to the north - eastern neighborhoods passing through the city centre , serving the north - eastern metropolitan area with two different branches . The line is 39.4 km ( 24.5 mi ) long and has 35 stations . Line 2 is the longest line of the Milan Metro and is the only one running partially overground . Northern branches run mostly on viaducts and southern Assago branch runs on the surface . The line has the southernmost and easternmost stations on the network ( Assago Forum and Gessate ) . - Azienda Trasporti Milanesi (ATM) is a public company, responsible for public transportation in Milan city and some surrounding municipalities, in Italy. It operates 19 tram lines, some of which are run with Peter Witt streetcars from the 1920s, 68 urban Bus lines, 4 Trolleybus lines, 51 interurban Bus lines, 4 underground lines (Metropolitana di Milano), carrying over 734 million passengers in 2010. - The euro (sign: ; code: EUR) is the official currency of the eurozone, which consists of 19 of the member states of the European Union: Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain. The currency is also officially used by the institutions of the European Union and four other European countries, as well as unilaterally by two others, and is consequently used daily by some 337million Europeans . Outside of Europe, a number of overseas territories of EU members also use the euro as their currency. - Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino and Vatican City. Italy covers an area of and has a largely temperate seasonal climate and Mediterranean climate; due to its shape, it is often referred to in Italy as "lo Stivale" (the Boot). With 61 million inhabitants, it is the fourth most populous EU member state. - Slovenia, officially the Republic of Slovenia (Slovene: , abbr.: "RS"), is a nation state in southern Central Europe, located at the crossroads of main European cultural and trade routes. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and the Adriatic Sea to the southwest. It covers and has a population of 2.06million. It is a parliamentary republic and a member of the United Nations, European Union, and NATO. The capital and largest city is Ljubljana. - The Milan Metro is the rapid transit system serving Milan, Italy, operated by Azienda Trasporti Milanesi. The network consists of 4 lines, identified by different numbers and colors, with a total network length of , and a total of 113 stations, mostly underground. It has a daily ridership of 1.15 million. After reading the paragraphs above, we are interested in knowing the entity with which 'milan metro line 2' exhibits the relationship of 'maintained by'. Find the answer from the choices below. Choices: - azienda trasporti milanesi - european union
azienda trasporti milanesi

Q: Information: - Electronics is the science of controlling electrical energy electrically, in which the electrons have a fundamental role. Electronics deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes, integrated circuits, associated passive electrical components, and interconnection technologies. Commonly, electronic devices contain circuitry consisting primarily or exclusively of active semiconductors supplemented with passive elements; such a circuit is described as an electronic circuit. - Plot. This story portrays Susono Musubi, a young police officer in a post-apocalyptic subterranean city that's thriving with activity, who is investigating recent child abductions. She finds a heavily toned down, sword-like Gravitational Beam Emitter as well as other elements that take different forms in the later publication (for example, Silicon life). - Digital electronics or digital (electronic) circuits are electronics that handle digital signals (discrete bands of analog levels) rather than by continuous ranges as used in analog electronics. All levels within a band of values represent the same information state. Because of this discretization, relatively small changes to the analog signal levels due to manufacturing tolerance, signal attenuation or noise do not leave the discrete envelope, and as a result are ignored by signal state sensing circuitry. - Analogue electronics ( or analog in American English ) are electronic systems with a continuously variable signal , in contrast to digital electronics where signals usually take only two levels . The term '' analogue '' describes the proportional relationship between a signal and a voltage or current that represents the signal . The word analogue is derived from the Greek word ( analogos ) meaning '' proportional '' . - In mathematics, discretization concerns the process of transferring continuous functions, models, and equations into discrete counterparts. This process is usually carried out as a first step toward making them suitable for numerical evaluation and implementation on digital computers. Processing on a digital computer requires another process called quantization. Dichotomization is the special case of discretization in which the number of discrete classes is 2, which can approximate a continuous variable as a binary variable (creating a dichotomy for modeling purposes, as in binary classification). After reading the paragraphs above, we are interested in knowing the entity with which 'analogue electronics' exhibits the relationship of 'part of'. Find the answer from the choices below. Choices: - city - classification - electronic circuit - electronics - life - mathematics - police - process - science - sword
A: electronic circuit