<P> Throughout the mid-1980s, Solidarity persevered as an exclusively underground organization . Its activists were dogged by the Security Service (SB), but managed to strike back: on May 1, 1982, a series of anti-government protests brought out thousands of participants--several dozen thousand in Kraków, Warsaw and Gdańsk . On May 3 more protests took place, during celebrations of the Constitution of May 3, 1791 . On that day, communist secret services killed four demonstrators--three in Warsaw and one in Wrocław . Another wave of demonstrations occurred on August 31, 1982, on the first anniversary of the Gdańsk Agreement (see August 31, 1982 demonstrations in Poland). Altogether, on that day six demonstrators were killed--three in Lubin, one in Kielce, one in Wrocław and one in Gdańsk . Another person was killed on the next day, during a demonstration in Częstochowa . Further strikes occurred at Gdańsk and Nowa Huta between October 11 and 13 . In Nowa Huta, a 20 - year - old student Bogdan Wlosik was shot by a secret service officer . </P> <P> On November 14, 1982, Wałęsa was released . However, on December 9 the SB carried out a large anti-Solidarity operation, arresting over 10,000 activists . On December 27 Solidarity's assets were transferred by the authorities to a pro-government trade union, the All - Poland Alliance of Trade Unions (Ogólnopolskie Porozumienie Związków Zawodowych, or OPZZ). Yet Solidarity was far from broken: by early 1983 the underground had over 70,000 members, whose activities included publishing over 500 underground newspapers . In the first half of 1983 street protests were frequent; on May 1, two persons were killed in Kraków and one in Wrocław . Two days later, two additional demonstrators were killed in Warsaw . </P> <P> On July 22, 1983, martial law was lifted, and amnesty was granted to many imprisoned Solidarity members, who were released . On October 5, Wałęsa was awarded the Nobel Peace Prize . The Polish government, however, refused to issue him a passport to travel to Oslo; Wałęsa's prize was accepted on his behalf by his wife . It later transpired that the SB had prepared bogus documents, accusing Wałęsa of immoral and illegal activities that had been given to the Nobel committee in an attempt to derail his nomination . </P> <P> On October 19, 1984, three agents of the Ministry of Internal Security murdered a popular pro-Solidarity priest, Jerzy Popiełuszko . As the facts emerged, thousands of people declared their solidarity with the murdered priest by attending his funeral, held on November 3, 1984 . The government attempted to smooth over the situation by releasing thousands of political prisoners; a year later, however, there followed a new wave of arrests . Frasyniuk, Lis and Adam Michnik, members of the "S" underground, were arrested on February 13, 1985, placed on a show trial, and sentenced to several years' imprisonment . </P>

Give two reason for the popularity of solidarity in poland