Background: Alice Paul was born on January 11, 1885, at Paulsdale in Mount Laurel Township, New Jersey. She was the eldest of four children of William Mickle Paul I (1850-1902) and Tacie Paul (nee Parry), and a descendant of William Penn, the Quaker founder of Pennsylvania. Her siblings were Willam, Helen, and Parry. She grew up in the Quaker tradition of public service; her ancestors included participants in the New Jersey Committee of Correspondence in the Revolutionary era and a state legislative leader in the 19th century.
Context: One of Paul's first big projects was initiating and organizing the 1913 Woman Suffrage Procession in Washington the day before President Wilson's inauguration. Paul was determined to put pressure on Wilson, because the President would have the most influence over Congress. She assigned volunteers to contact suffragists around the nation and recruit supporters to march in the parade. In a matter of weeks, Paul succeeded in gathering roughly eight-thousand marchers, representing most of the country. However, she had much more trouble gaining institutional support for the protest parade. Paul was insistent that the parade route go along Pennsylvania Avenue before President Wilson. The goal was to send the message that the push for women's suffrage existed before Wilson and would outlast him if need be. This route was originally resisted by DC officials, and according to biographer Christine Lunardini, Paul was the only one who truly believed the parade would take place on that route. Eventually the city ceded the route to NAWSA. However, this was not the end of the parade's troubles. The City Supervisor Sylvester claimed that the women would not be safe marching along the Pennsylvania Avenue route and strongly suggested the group move the parade. Paul responded by demanding Sylvester provide more police; something that was not done. On March 13, 1913 the parade gained a boost in legitimacy as Congress passed a special resolution ordering Sylvester to prohibit all ordinary traffic along the parade route and "prevent any interference" with the suffrage marchers.  On the day of the event, the procession proceeded along Paul's desired route. The event, which was led by notable labor lawyer Inez Milholland dressed in white and riding a horse was described by the New York Times as "one of the most impressively beautiful spectacles ever staged in this country." Multiple bands, banners, squadrons, chariots, and floats were also displayed in the parade representing all women's lives. One of the most notable sights was the lead banner in the parade which declared, "We Demand an Amendment to the United States Constitution Enfranchising the Women of the Country. "Over half a million people came to view the parade and with insufficient police protection, the situation soon devolved into a near-riot, with onlookers pressing so close to the women that they were unable to proceed. Police largely did nothing to protect the women from rioters. A senator who participated in the march later testified that he personally took the badge numbers of 22 officers who had stood idle, including 2 sergeants. Eventually, the Massachusetts and Pennsylvania national guards stepped in and students from the Maryland Agricultural College provided a human barrier to help the women pass. Some accounts even describe Boy Scouts as stepping in and providing first aid to the injured. The incident mobilized public dialogue about the police response to the women's demonstration, producing greater awareness and sympathy for NAWSA.  After the parade, the NAWSA's focus was lobbying for a constitutional amendment to secure the right to vote for women. Such an amendment had originally been sought by suffragists Susan B. Anthony and Elizabeth Cady Stanton who, as leaders of the NWSA, fought for a federal amendment to the constitution securing women's suffrage until the 1890 formation of NAWSA, which campaigned for the vote on a state-by-state basis.
Question: how long did they lobby

Answer: