Given a document, find the main entity about whom the author is writing. Write the full name if mentioned in the text. Note that URLs in the text have been replaced with [Link].

Input: Consider Input: "We would oppose any violence if that were to take place "  State Department spokeswoman Heather Nauert  said in response to reports that this kind of coordination was being considered. "We hope our voices will be heard in a very strong fashion that we oppose violence on any side of this."
 She  was responding to a report that Iran and Iraq plan to seize control of the border crossings around a semi-autonomous region of northern Iraq that is populated by a Kurdish ethnic minority that plays a crucial role in the U.S.-led coalition to defeat the Islamic State. The tensions have arisen because the Kurds voted in support of breaking away from the rest of Iraq to form their own state  despite opposition from Baghdad and the United States.
 Nauert  took a cautious approach to the diplomatic crisis. "The United States does not want to do anything that would inflame tensions  that's why I'm going to be very cautious with my words "  she  said during Thursday's briefing. "We will continue to offer our assistance to facilitate any dialogue if we are asked."
 Nauert  said  she  had not heard of a request for the United States to close its consulate in northern Iraq.
"Our relationship with the Kurds  in our view  will not change "  she  said.

Output: Heather Nauert


Input: Consider Input: Delonda Walker  alerted police Tuesday after suspect Howell Donaldson III  24  handed  her  a McDonald's food bag containing a .40-caliber Glock  which Tampa police later said matched the murder weapon used in all four shootings that occurred in the Seminole Heights neighborhood between Oct. 9 and Nov. 14.
Donaldson allegedly told  Walker  that he planned to leave the state.  Walker  then approached a police officer who happened to be at the Ybor City McDonald's to turn over the bag  officials said.
In a statement read by Buckhorn in a press conference Friday   Walker  said  "receiving a reward never entered my mind."
"I went to work on Tuesday intending to serve customers and do my job. The day turned out very differently "  she  said. "When confronted with this situation  I wanted to do the right thing and I reached out to a nearby police officer."
 Walker  said  she  is "grateful" that  she  was able to assist law enforcement but requested privacy amid the ongoing investigation.
"... I appreciate all the well wishes and kind words from our community "  she  said.
Buckhorn praised Walker for  her  actions.
" She  is what’s right about this city " Buckhorn said.

Output: Delonda Walker


Input: Consider Input: The 2017 Nobel Prize in chemistry has been awarded to  researchers Jacques Dubochet  Joachim Frank and Richard Henderson  for  their  work that developed cryo-electron microscopy  which the Royal Swedish Academy of Sciences says "both simplifies and improves the imaging of biomolecules."
Speaking to the prize committee by phone Wednesday morning   Frank  said  he  had thought the chance of  him  winning the prestigious honor was "minuscule."
 He  added that cryo-electron microscopy "is about to completely transform structural biology " saying the technology is being taken up by a new generation of medical researchers.
Dubochet is affiliated with the University of Lausanne  in Switzerland;  Frank  is affiliated with Columbia University in New York; Henderson is affiliated with the MRC Laboratory of Molecular Biology in Cambridge  U.K.
"Electron microscopes were long believed to only be suitable for imaging dead matter  because the powerful electron beam destroys biological material. But in 1990  Richard Henderson succeeded in using an electron microscope to generate a three-dimensional image of a protein at atomic resolution. This breakthrough proved the technology's potential. " Joachim Frank  made the technology generally applicable. Between 1975 and 1986  he  developed an image processing method in which the electron microscope's fuzzy twodimensional images are analysed and merged to reveal a sharp three-dimensional structure. "Jacques Dubochet added water to electron microscopy. Liquid water evaporates in the electron microscope's vacuum  which makes the biomolecules collapse. In the early 1980s  Dubochet succeeded in vitrifying water â  he  cooled water so rapidly that it solidified in its liquid form around a biological sample  allowing the biomolecules to retain their natural shape even in a vacuum."


Output: Joachim Frank