paragraph_text: In the 19th century, the mass - to - charge ratios of some ions were measured by electrochemical methods. In 1897, the mass - to - charge ratio of the electron was first measured by J.J. Thomson. By doing this, he showed that the electron was in fact a particle with a mass and a charge, and that its mass - to - charge ratio was much smaller than that of the hydrogen ion H. In 1898, Wilhelm Wien separated ions (canal rays) according to their mass - to - charge ratio with an ion optical device with superimposed electric and magnetic fields (Wien filter). In 1901 Walter Kaufman measured the increase of electromagnetic mass of fast electrons (Kaufmann -- Bucherer -- Neumann experiments), or relativistic mass increase in modern terms. In 1913, Thomson measured the mass - to - charge ratio of ions with an instrument he called a parabola spectrograph. Today, an instrument that measures the mass - to - charge ratio of charged particles is called a mass spectrometer.

paragraph_text: Electric charge Electric field of a positive and a negative point charge Common symbols Q SI unit coulomb Other units elementary charge faraday ampere - hour In SI base units C = A s Extensive? yes Conserved? yes Dimension

paragraph_text: Belgium's War Crimes Law invokes the concept of universal jurisdiction to allow anyone to bring war crime charges in Belgian courts, regardless of where the alleged crimes have taken place.

paragraph_text: Yusa is a Cuban singer and songwriter, born in the Buena Vista district of Havana, Cuba. Her music is recognised worldwide : in 2003, she was nominated at the prestigious BBC Radio 3 World Music Awards in two categories (Best Newcomer and Best of the Americas.)

paragraph_text: Charge is the fundamental property of forms of matter that exhibit electrostatic attraction or repulsion in the presence of other matter. Electric charge is a characteristic property of many subatomic particles. The charges of free - standing particles are integer multiples of the elementary charge e; we say that electric charge is quantized. Michael Faraday, in his electrolysis experiments, was the first to note the discrete nature of electric charge. Robert Millikan's oil drop experiment demonstrated this fact directly, and measured the elementary charge. It has been discovered that one type of particle, quarks, have fractional charges of either − 1 / 3 or + 2 / 3, but it is believed they always occur in multiples of integral charge; free - standing quarks have never been observed.

paragraph_text: The International Who's Who in Music is a biographical dictionary and directory originally published by the International Biographical Centre located in Cambridge, England. It contains only biographies of persons living at the time of publication and includes composers, performers, writers, and some music librarians. The biographies included are solicited from the subjects themselves and generally include date and place of birth, contact information as well as biographical background and achievements.

paragraph_text: Peter Fliesteden (date of birth unknown; died 28 September 1529) was condemned to be burnt at the stake at Melaten near Cologne, as one of the first Protestant martyrs of the Reformation on the Lower Rhine in Germany. He was born in a tiny place also called Fliesteden (now part of Bergheim, Rhein-Erft-Kreis) on an unknown date.

paragraph_text: The Qur'an relates detailed narrative accounts of Maryam (Mary) in two places, Qur'an 3:35–47 and 19:16–34. These state beliefs in both the Immaculate Conception of Mary and the Virgin birth of Jesus. The account given in Sura 19 is nearly identical with that in the Gospel according to Luke, and both of these (Luke, Sura 19) begin with an account of the visitation of an angel upon Zakariya (Zecharias) and Good News of the birth of Yahya (John), followed by the account of the annunciation. It mentions how Mary was informed by an angel that she would become the mother of Jesus through the actions of God alone.

paragraph_text: Cardigan formed up his unit and charged the length of the Valley of the Balaclava, under fire from Russian batteries in the hills. The charge of the Light Brigade caused 278 casualties of the 700-man unit. The Light Brigade was memorialized in the famous poem by Alfred Lord Tennyson, "The Charge of the Light Brigade." Although traditionally the charge of the Light Brigade was looked upon as a glorious but wasted sacrifice of good men and horses, recent historians say that the charge of the Light Brigade did succeed in at least some of its objectives. The aim of any cavalry charge is to scatter the enemy lines and frighten the enemy off the battlefield. The charge of the Light Brigade had so unnerved the Russian cavalry, which had previously been routed by the Heavy Brigade, that the Russian Cavalry was set to full-scale flight by the subsequent charge of the Light Brigade.:252

paragraph_text: The end of World War II brought a baby boom to many countries, especially Western ones. There is some disagreement as to the precise beginning and ending dates of the post-war baby boom, but it is most often agreed to have begun in the years immediately after the war, though some place it earlier at the increase of births in 1941 - 1943. The boom started to decline as birth rates in the United States started to decline in 1958, though the boom would only grind to a halt 3 years later in 1961, 20 years after it began.

paragraph_text: Two types of charging port exist: the charging downstream port (CDP), supporting data transfers as well, and the dedicated charging port (DCP), without data support. A portable device can recognize the type of USB port; on a dedicated charging port, the D+ and D− pins are shorted with a resistance not exceeding 200 ohms, while charging downstream ports provide additional detection logic so their presence can be determined by attached devices. (see ref pg. 2, Section 1.4.5, & Table 5-3 "Resistances"—pg. 29).

paragraph_text: Lucky Whitehead Whitehead with the Dallas Cowboys in 2015 Free agent Position: Wide receiver Birth name: Rodney Darnell Whitehead Jr. Date of birth: (1992 - 06 - 02) June 2, 1992 (age 25) Place of birth: Manassas, Virginia Height: 5 ft 9 in (1.75 m) Weight: 180 lb (82 kg) Career information High school: Manassas (VA) Osbourn College: Florida Atlantic Undrafted: 2015 Career history Dallas Cowboys (2015 -- 2016) New York Jets (2017) Career highlights and awards All - C - USA (2014) Career NFL statistics as of Week 17, 2016 Receptions: 9 Receiving yards: 64 Rushing yards: 189 Total return yards: 1,151 Total touchdowns: 0 Player stats at NFL.com Player stats at PFR

paragraph_text: The current mayor of Havana ("President of the People's Power Provincial Assembly") is Marta Hernández Romero, she was elected on March 5, 2011.

paragraph_text: The Jardin botanique de Sedan is a botanical garden and city park located on Philippoteaux Avenue beside the Place d'Alsace-Lorraine, Sedan, Ardennes, Champagne-Ardenne, France. It is open daily without charge.

paragraph_text: Low birth weight (LBW) is defined by the World Health Organization as a birth weight of a infant of 2,499 g or less, regardless of gestational age. Subcategories include very low birth weight (VLBW), which is less than 1500 g (3 pounds 5 ounces), and extremely low birth weight (ELBW), which is less than 1000 g (2 pounds 3 ounces). Normal weight at term delivery is 2500 -- 4200 g (5 pounds 8 ounces -- 9 pounds 4 ounces).

paragraph_text: Birth control practices were generally adopted earlier in Europe than in the United States. Knowlton's book was reprinted in 1877 in England by Charles Bradlaugh and Annie Besant, with the goal of challenging Britain's obscenity laws. They were arrested (and later acquitted) but the publicity of their trial contributed to the formation, in 1877, of the Malthusian League -- the world's first birth control advocacy group -- which sought to limit population growth to avoid Thomas Malthus's dire predictions of exponential population growth leading to worldwide poverty and famine. By 1930, similar societies had been established in nearly all European countries, and birth control began to find acceptance in most Western European countries, except Catholic Ireland, Spain, and France. As the birth control societies spread across Europe, so did birth control clinics. The first birth control clinic in the world was established in the Netherlands in 1882, run by the Netherlands' first female physician, Aletta Jacobs. The first birth control clinic in England was established in 1921 by Marie Stopes, in London.

paragraph_text: The League series is an ongoing romance book series by the American author Sherrilyn Kenyon. The books are published by St. Martin's Press. It consists of eleven books that take place in a future time in a place known as the Ichidian Universe. In this universe, The League is in charge. The brutal, expertly trained League Assassins are essentially the power of the government. But like all governments, even the League is corrupt. The tagline for the series is "In Morte Veritas" (In Death, There is Truth).

paragraph_text: The date and place of Nikitaras' birth are disputed, but he is thought to have been born either in the village of Nedoussa (Νέδουσα) in the Peloponnesian province of Messenia or in Leontari in Arcadia circa 1784. He was a nephew of Theodoros Kolokotronis, the most important Greek military leader of the Revolution. Turkish authorities tried to capture him, as well as Kolokotronis, but he escaped and joined his uncle in the British-held Ionian Islands.

paragraph_text: Her foster daughter Liliuokalani said "I knew no other father or mother than my foster-parents, no other sister than Bernice." Kōnia died during the influenza epidemic of Hawaii on July 2, 1857. The death of Pākī and Kōnia placed Liliuokalani under the charge of Bishop and Bernice.

paragraph_text: Maurice Hope (born 6 December 1951 in St. John's, Antigua) is a former boxer from England, who was world Jr. Middleweight champion. Hope lived in Hackney most of his life, but now lives in his place of birth, Antigua. He represented Great Britain at the 1972 Summer Olympics in Munich, West Germany.

Question: Who is the mayor of Yusa's birthplace?
Answer: Marta Hernández Romero