Question: Tightrope Walker is an outdoor bronze sculpture that commemorates an American soldier, lawyer, intelligence officer and diplomat best remembered as the wartime head of what?

Context paragraphs:
The Dream (sculpture): The Dream, also known as the Dr. Martin Luther King, Jr.  Memorial Sculpture, is an outdoor bronze sculpture of Martin Luther King Jr. by Michael Florin Dente, located outside the Oregon Convention Center in Portland, Oregon.  The 8 ft memorial statue was dedicated on August 28, 1998, the 35th anniversary of King's "I Have a Dream" speech.  It depicts King plus three allegorical sculptures: a man who symbolizes the American worker, a woman who represents immigration, and a young girl shown releasing King's coattail, who represents, according to Dente, the "letting go" that occurs when people sacrifice their time and energy to engage in a struggle.  The sculpture is part of the City of Portland and Multnomah County Public Art Collection, courtesy of the Regional Arts & Culture Council.

William J. Donovan: William Joseph ("Wild Bill") Donovan (January 1, 1883 – February 8, 1959) was an American soldier, lawyer, intelligence officer and diplomat.  Donovan is best remembered as the wartime head of the Office of Strategic Services (OSS), the precursor to the Central Intelligence Agency, during World War II.  He is also known as the "Father of American Intelligence" and the "Father of Central Intelligence".  "The Central Intelligence Agency regards Donovan as its founding father," according to journalist Evan Thomas in a 2011 "Vanity Fair" profile.  The lobby of CIA headquarters, in Langley, Virginia, now features a statue of Donovan.  Thomas observed that Donovan's "exploits are utterly improbable but by now well documented in declassified wartime records that portray a brave, noble, headlong, gleeful, sometimes outrageous pursuit of action and skulduggery."

José Bonifácio de Andrada e Silva (Lima): José Bonifácio de Andrada e Silva, also known as the Andrada Monument, is an outdoor bronze sculpture of José Bonifácio de Andrada by José Otavio Correia Lima, located at Bryant Park in Manhattan, New York.  It is 9 ft tall and weights approximately 4,000 lbs.  Lima was selected through a competition that was sponsored by the Brazilian government, which also donated $60,000 for the surrounding plaza and granite base.  The sculpture was cast in 1954 and dedicated on April 22, 1955.  Ceremony attendees included Manhattan Borough President Hulan Jack, Parks Commissioner Robert Moses, Brazilian Ambassador to the United States Joao Calos Muniz, Deputy Assistant Secretary of State of Inter-American Affairs Edward J. Spears, Cardinal Francis Spellman, and Mayor Robert F. Wagner, Jr. Originally located at the northwest corner of Bryant Park, it was moved to its current location along Avenue of the Americas, between 40th and 42nd Streets, in the early 1990s.  Every September, the Consulate General of Brazil commemorates Andrada and Brazilian Independence Day by hosting a small ceremony at the monument.

Tightrope Walker (sculpture): Tightrope Walker (sometimes Tight Rope Walker) is an outdoor bronze sculpture by Dutch artist Kees Verkade, installed on Columbia University's Revson Plaza in Upper Manhattan, New York City, in 1979.  The work commemorates General William J. Donovan and depicts one figure standing atop another as he tightrope walks.

Gertrude Stein (Davidson): Gertrude Stein is an outdoor bronze sculpture of Gertrude Stein, located at Bryant Park in Manhattan, New York.  The casting was installed in 1992 and is based on a model created by Jo Davidson in Paris in 1923.  It neighbors the New York Public Library Main Branch, which, according to the New York City Department of Parks and Recreation, commemorates Stein's "significant literary contributions".

Jason Lee (Proctor): Jason Lee, also known as Reverend Jason Lee, is an outdoor bronze sculpture of Jason Lee, located in Salem, Oregon, United States.  It was designed by Alexander Phimister Proctor, who died in 1950 when only the work's model was finished.  His son Gifford MacGregor Proctor completed the sculpture between 1950 and 1953.  The one installed on the grounds of the Oregon State Capitol is a duplicate of a bronze statue unveiled in the United States Capitol in 1952.

Romeo and Juliet (Hebald): Romeo and Juliet is an outdoor bronze sculpture depicting Romeo and Juliet by American artist Milton Hebald, located in front of Delacorte Theater in Manhattan's Central Park, in the United States.  It is one of two companion works at the theater sculpted by Hebald, the other being "The Tempest" (1966).  Unveiled in 1977 and cast in 1978, "Romeo and Juliet" was donated by philanthropist George T. Delacorte, Jr. The sculpture is 7 ft tall; the two figures, shown embracing, are set on a granite pedestal.  A cast from the same mold appears in the rose garden at the Hollenbeck Palms retirement community in Boyle Heights, Los Angeles.

Royal Marines Memorial: The Royal Marines Memorial, also known as the Graspan Royal Marines Memorial, is an outdoor bronze sculpture by Adrian Jones, installed on the north side of The Mall in London, United Kingdom.  Located next to Admiralty Arch, the 1903 memorial commemorates the Royal Marines who died in the Boxer Rebellion in China and the Second Boer War in Africa, and depicts two figures on a Portland stone plinth.

Indian Hunter (sculpture): Indian Hunter is an outdoor bronze sculpture by John Quincy Adams Ward, located at Central Park in Manhattan, New York.  It was cast in 1866 and dedicated on February 4, 1869.  The statue was Central Park's first sculpture by an American artist.

Abraham Lincoln (Brown): Abraham Lincoln is an outdoor bronze sculpture of Abraham Lincoln by Henry Kirke Brown, located at Union Square in Manhattan, New York.  Cast in 1870 and dedicated on September 16 of that year, the statue was originally installed at the southwest corner of Union Square, where the sculpture of Mahatma Gandhi stands today.  In 1875, a stone and bronze rail fence was constructed around the statue of Lincoln; the fence included an inscription of text from his second inaugural address, “…with malice toward none; charity toward all.”  During the 1930 redesign of Union Square Park, the statue was moved to its current location, but the fence remained.  The statue is in axial alignment with the Independence Flagstaff and "George Washington".  It was conserved in 1992.

Supporting paragraphs: Tightrope Walker (sculpture) William J. Donovan
Answer: Office of Strategic Services