Question: When did Pablo Picasso paint The Red Armchair?
About the article "Pablo Picasso", section "Style and technique".

Candidate passages:
Woman in a Red Armchair is a painting by artist Pablo Picasso.
It was painted in 1929 and is currently owned by the Houston art gallery, The Menil Collection. 
Picasso was exceptionally prolific throughout his long lifetime.
The total number of artworks he produced has been estimated at 50,000, comprising 1,885 paintings; 1,228 sculptures; 2,880 ceramics, roughly 12,000 drawings, many thousands of prints, and numerous tapestries and rugs.
The medium in which Picasso made his most important contribution was painting.
In his paintings, Picasso used color as an expressive element, but relied on drawing rather than subtleties of color to create form and space.
He sometimes added sand to his paint to vary its texture.
A nanoprobe of Picasso's "The Red Armchair" (1931) by physicists at Argonne National Laboratory in 2012 confirmed art historians' belief that Picasso used common house paint in many of his paintings.
Much of his painting was done at night by artificial light.
Picasso's early sculptures were carved from wood or modeled in wax or clay, but from 1909 to 1928 Picasso abandoned modeling and instead made sculptural constructions using diverse materials.
An example is "Guitar" (1912), a relief construction made of sheet metal and wire that Jane Fluegel terms a "three-dimensional planar counterpart of Cubist painting" that marks a "revolutionary departure from the traditional approaches, modeling and carving".
From the beginning of his career, Picasso displayed an interest in subject matter of every kind, and demonstrated a great stylistic versatility that enabled him to work in several styles at once.
For example, his paintings of 1917 included the pointillist "Woman with a Mantilla", the Cubist "Figure in an Armchair", and the naturalistic "Harlequin" (all in the Museu Picasso, Barcelona).
In 1919, he made a number of drawings from postcards and photographs that reflect his interest in the stylistic conventions and static character of posed photographs.
In 1921 he simultaneously painted several large neoclassical paintings and two versions of the Cubist composition "Three Musicians" (Museum of Modern Art, New York; Philadelphia Museum of Art).
In an interview published in 1923, Picasso said, "The several manners I have used in my art must not be considered as an evolution, or as steps towards an unknown ideal of painting … If the subjects I have wanted to express have suggested different ways of expression I have never hesitated to adopt them.
"Although his Cubist works approach abstraction, Picasso never relinquished the objects of the real world as subject matter.
Prominent in his Cubist paintings are forms easily recognized as guitars, violins, and bottles.
When Picasso depicted complex narrative scenes it was usually in prints, drawings, and small-scale works; "Guernica" (1937) is one of his few large narrative paintings.
Picasso painted mostly from imagination or memory.
According to William Rubin, Picasso "could only make great art from subjects that truly involved him ….
Unlike Matisse, Picasso had eschewed models virtually all his mature life, preferring to paint individuals whose lives had both impinged on, and had real significance for, his own."
The art critic Arthur Danto said Picasso's work constitutes a "vast pictorial autobiography" that provides some basis for the popular conception that "Picasso invented a new style each time he fell in love with a new woman".
The autobiographical nature of Picasso's art is reinforced by his habit of dating his works, often to the day.
He explained: "I want to leave to posterity a documentation that will be as complete as possible.
That's why I put a date on everything I do."
In June 2012, a museum visitor defaced an original Picasso at the museum, "Woman in a Red Armchair". 
 Woman in a Red Armchair (Houston Menil Collection)  
Picasso at the Lapin Agile is a play written by Steve Martin in 1993.
It features the characters of Albert Einstein and Pablo Picasso, who meet at a bar called the Lapin Agile (Nimble Rabbit) in Montmartre, Paris.
It is set on October 8, 1904, and both men are on the verge of an amazing idea (Einstein will publish his special theory of relativity in 1905 and Picasso will paint "Les Demoiselles d'Avignon" in 1907) when they find themselves at the Lapin Agile, where they have a lengthy debate about the value of genius and talent while interacting with a host of other characters.