Question: Who introduced Van Gogh to etching?
About the article "Portrait of Dr. Gachet", section "Etching".

Candidate passages:
Van Gogh, introduced to etching by Gachet, made the etching "Portrait of Doctor Gachet" in 1890.
Gachet and Van Gogh discussed creating a series of southern France themes but that never happened.
This was the one and only etching, also known as "L'homme à la pipe" (Man with a pipe), that Van Gogh ever made.
Van Gogh's brother, Theo, who received an impression of the etching, called it "a true painter's etching.
No refinement in the execution, but a drawing on metal."
It is a different pose than that in Van Gogh's "Portrait of Dr. Gachet", owned by Musée d'Orsay.
The National Gallery of Canada finds that "The undulating flow of the line is typical of the expressive quality of Van Gogh's late style."
The impression owned by the National Gallery is from one of the 60 printings following Van Gogh's death by Dr. Gachet's son, Paul Gachet Jr. Gachet's collector's stamp appears on the bottom edge of the print.
In 1886 Van Gogh left Holland for Paris never to return.
His brother Theo, a successful Parisian art dealer, provided Van Gogh the support and connections for an immersion in modern art.
In Holland Van Gogh was influenced by great Dutch masters as well as Anton Mauve a Dutch realist painter who was a leading member of the Hague School.
Mauve was a significant early influence on his cousin-in-law Vincent van Gogh.
Starting March, 1886 Van Gogh studied with Fernand Cormon.
During that time he lived with his brother Theo who leased a large apartment on Rue Lepic in Montmartre with space for a studio for Van Gogh.
Three months later Van Gogh abandoned his studies with Cormon, but his education continued as he met local artists.
During 1886 he was introduced to Impressionist artists and their works, such as Edgar Degas, Claude Monet, Auguste Renoir, Georges Seurat and Paul Signac.
In 1887 Van Gogh continued to make important connections with other artists who he befriended and exchanged paintings with, such as Louis Anquetin, Émile Bernard, Armand Guillaumin, Lucien Pissarro and Paul Signac.
Having been introduced to Impressionism and Pointillism in Paris, Van Gogh began experimenting with related techniques, first on a series of self-portraits before he moved on to larger, more complex compositions.
Many of the Impressionist artists also shared his interest in Japanese wood block prints.
The works of Japanese print makers, Hiroshige and Hokusai greatly influenced Van Gogh, both for the beautiful subject matter and the style of flat patterns of colors, without shadow.
Van Gogh arranged an exhibit in Paris of Japanese prints at Café du Tambourin.
In the two years, from 1886 through 1888, Van Gogh emerged as a sophisticated, thoughtful and provoking artist.
It is through association with artists in Paris that Van Gogh began to dream of a utopian artists community where "like-minded" individuals would realize "the perfect art."
A Woman Walking in a Garden was painted by Vincent van Gogh in 1887.
As the title indicates, it depicts a woman walking through a garden.
Greenery is everywhere and numerous trees can be seen in the background.
In 1886 van Gogh left Holland for Paris never to return.
His brother Theo, a successful Parisian art dealer, provided van Gogh the support and connections for an immersion in modern art.
In the two years, from 1886 through 1888, van Gogh emerged as a sophisticated, thoughtful and provoking artist.
During 1886 van Gogh was introduced to Impressionist artists and their works, such as Edgar Degas, Claude Monet, Auguste Renoir, Georges Seurat and Paul Signac.
In 1887 van Gogh continued to make important connections with other artists who he befriended and exchanged paintings with, such as Louis Anquetin, Émile Bernard, Armand Guillaumin, Lucien Pissarro and Paul Signac.
Having been introduced to Impressionism and Pointillism in Paris, van Gogh began experimenting with related techniques.
Van Gogh also utilized complementary colors to allow the formation of vibrant contrasts which enhance each other when juxtaposed. 
Vincent van Gogh (1853–1890) was a Post-Impressionist Dutch painterVan Gogh or van Gogh, a family name meaning "from Gogh", may also refer to: 
In 2008 Yolande Clergue’s original ambition to create a Fondation Van Gogh was given new momentum by Luc Hoffmann who established a permanent framework called Fondation Vincent van Gogh Arles for activities designed to preserve the memory of Vincent Van Gogh in Arles and to foster contemporary art.