Question: How many South Vietnamese were executed in killings?
About the article "Vietnam", section "1976–present: reunification and reforms".

Candidate passages:
The Chau Doc massacre was the July 11, 1957 killing of 17 people in the small town of Châu Đốc in An Giang Province, near the border with Cambodia, in what was then known as South Vietnam.
The killings were part of a low-level campaign targeting South Vietnamese officials. 
The New Economic Zones program was implemented by the Vietnamese communist government after the Fall of Saigon.
Between 1975 and 1980, more than 1 million northerners migrated to the south and central regions formerly under the Republic of Vietnam.
This program, in turn, displaced around 750,000 to over 1 million Southerners from their homes and forcibly relocated them to uninhabited mountainous forested areas.
Properties of evicted southern Vietnamese were confiscated, collectivized, and then redistributed by the communist authorities, and the recipients of these confiscated properties were often former Viet Cong, and members or affiliates of the North Vietnamese communist party or army.
This, combined with grave human rights violations, lack of economic freedom, and poverty produced by governmental mismanagement of the centrally planned economy caused a mass exodus of 1-3 million Vietnamese fleeing communist rule, the majority of whom were from South Vietnam.
Conditions in the "New Economic Zones" were poor.
After a 1976 visit to a new economic area for former Saigon, French journalist Jean Lacouture wrote that it was "a prefabricated hell and a place one comes to only if the alternative to it would be death."
R.J. Rummel, an analyst of political killings, estimated that between 20,000 and 155,000 Vietnamese died performing hard labor in NEZs.
Since 1975, Southern Vietnamese use the term "Bắc 54" ("Tonkin 54") to refer to Northern Vietnamese who migrated to the South in 1954 (as part of Operation Passage to Freedom, who were mainly political and religious refugees fleeing impending communist rule), and "Bắc 75" ("Tonkin 75") to refer to Northerners who migrated to the South in 1975 onwards, many under this economic program. 
In the aftermath of the war, under Lê Duẩn's administration, the government embarked on a mass campaign of collectivization of farms and factories.
This caused economic chaos and resulted in triple-digit inflation, while national reconstruction efforts progressed slowly.
At least one million South Vietnamese were sent to reeducation camps, with an estimated 165,000 prisoners dying.
Between 100,000 and 200,000 South Vietnamese were executed in extrajudicial killings; another 50,000 died performing hard labor in "New Economic Zones".
In the late 1970s and early 1980s, millions of people fled the country in crudely built boats, creating an international humanitarian crisis; hundreds of thousands died at sea.
In 1978, the Vietnamese military invaded Cambodia to remove from power the Khmer Rouge, who had been attacking Vietnamese border villages.
Vietnam was victorious, installing a government in Cambodia which ruled until 1989.
This action worsened relations with the Chinese, who launched a brief incursion into northern Vietnam in 1979.
This conflict caused Vietnam to rely even more heavily on Soviet economic and military aid.
At the Sixth National Congress of the Communist Party of Vietnam in December 1986, reformist politicians replaced the "old guard" government with new leadership.
The reformers were led by 71-year-old Nguyen Van Linh, who became the party's new general secretary.
Linh and the reformers implemented a series of free-market reforms – known as "" ("Renovation") – which carefully managed the transition from a planned economy to a "socialist-oriented market economy".
Though the authority of the state remained unchallenged under "Đổi Mới", the government encouraged private ownership of farms and factories, economic deregulation and foreign investment, while maintaining control over strategic industries.
The Vietnamese economy subsequently achieved strong growth in agricultural and industrial production, construction, exports and foreign investment.
However, these reforms have also caused a rise in income inequality and gender disparities.
Events in Southeast Asia.
On 2 July 1976, North and South Vietnam were merged to form the Socialist Republic of Vietnam.
Following the communist takeover, 1–2.5 million South Vietnamese were sent to reeducation camps, with an estimated 165,000 prisoners dying.
Between 100,000 and 200,000 South Vietnamese were executed.
R. J. Rummel, an analyst of political killings, estimated that about 50,000 South Vietnamese deported to "New Economic Zones" died performing hard labor, out of the 1 million that were sent.
200,000 to 400,000 Vietnamese boat people died at sea, according to the United Nations High Commissioner for Refugees.
Phnom Penh, the capital of Cambodia, fell to the communist Khmer Rouge on 17 April 1975.
Under the leadership of Pol Pot, the Khmer Rouge would eventually kill 1–3 million Cambodians in the Killing Fields, out of a population of around 8 million.
At least 1,386,734 victims of execution have been counted in mass graves, while demographic analysis suggests that the policies of the regime caused between 1.7 and 2.5 million excess deaths altogether (including disease and starvation).
After repeated border clashes in 1978, Vietnam invaded Democratic Kampuchea (Cambodia) and ousted the Khmer Rouge in the Cambodian–Vietnamese War.
The Vietnamese installed a new government led by Khmer Rouge defectors, which killed tens of thousands and enslaved hundreds of thousands.
In response, China invaded Vietnam in 1979.
The two countries fought a brief border war, known as the Sino-Vietnamese War.
From 1978 to 1979, some 450,000 ethnic Chinese left Vietnam by boat as refugees or were expelled across the land border with China.
The communist Pathet Lao overthrew the royalist government of Laos in December 1975, establishing the Lao People's Democratic Republic.
The conflict between Hmong rebels and the Pathet Lao continued in isolated pockets.
The government of Laos has been accused of committing genocide against the Hmong in collaboration with the People's Army of Vietnam, with up to 100,000 killed out of a population of 400,000.
From 1975 to 1996, the United States resettled some 250,000 Lao refugees from Thailand, including 130,000 Hmong.
More than 3 million people fled from Vietnam, Laos, and Cambodia, many as "boat people" in the Indochina refugee crisis.
Most Asian countries were unwilling to accept refugees.
Since 1975, an estimated 1.4 million refugees from Vietnam and other Southeast Asian countries have been resettled to the United States, while Canada, Australia, and France resettled over 500,000.
In 1988, Vietnam suffered a famine that afflicted millions.
Vietnam played a role in Asia similar to Cuba's in Latin America: it supported local revolutionary groups and was a headquarters for Soviet-style communism.
Explosive remnants of war (ERW) continue to detonate and kill people today.
The Vietnamese government claims that ordnance has killed some 42,000 people since the war officially ended.
In 2012 alone, unexploded bombs and other ordnance claimed 500 casualties in Vietnam, Laos and Cambodia, according to activists and government databases.
Agent Orange and similar chemical substances, have also caused a considerable number of deaths and injuries over the years, including the US Air Force crew that handled them.
On the 9th of August 2012, the United States and Vietnam began a cooperative cleaning up of the toxic chemical on part of Danang International Airport, marking the first time Washington has been involved in cleaning up Agent Orange in Vietnam. 
The song is set to the tune of "The Battle Hymn of the Republic".
It offers a heroic description of Lieutenant William Calley, who in March 1971 was convicted of murdering Vietnamese civilians in the My Lai Massacre of March 16, 1968.
The song discusses different opinions of the Vietnam War.
It starts of with Calley's childhood and how being a part of the war and fighting for your country was an aspiration for young children.
It later on discusses how at the time many Americans believed the killings in the war were wrong "they've made me out a villain".
Then the song talks about how whilst in Vietnam soldiers were being killed and ambushed.
Finally it ends by saying that Calley was not to blame he was only following orders and he thought it was an honor to fight at first but there was no purpose or reward in doing so.