Question: How many assaults were to converge on Warsaw?
About the article "Invasion of Poland", section "German plan".

Candidate passages:
The origins of the plan went back to 1928 when Werner von Fritsch started working on it.
"Fall Weiss" was developed primarily by Günther Blumentritt and Erich von Manstein while the two were serving as staff officers under General Gerd von Rundstedt with Army Group South in Silesia.
The plan called for a start of hostilities before the declaration of war.
German units were to invade Poland from three directions:  Main attack from the German mainland across the western border of Poland.
Second route of attack from the north, from the exclave of East Prussia.
Tertiary attack by German and allied Slovak units across the border of Slovakia.
All three assaults were to converge on Warsaw, while the main Polish army was to be encircled and destroyed west of the Vistula River.
"Fall Weiss" was initiated on 1 September 1939, and was the first European military operation of World War II. 
 "For more details on this period see: Underground Education in Poland During World War II" World War II.
After the Polish Defensive War of 1939 the German authorities of the General Government closed all the institutions of higher education in Poland.
The equipment and most of the laboratories were taken to Germany and divided amongst the German universities while the main campus of the University of Warsaw was turned into military barracks.
German racist theories assumed that no education of Poles was needed and the whole nation was to be turned into uneducated serfs of the German race.
Education in Polish was banned and punished with death.
However, many professors organized the so-called "Secret University of Warsaw" ("Tajny Uniwersytet Warszawski").
The lectures were held in small groups in private apartments and the attendants were constantly risking discovery and death.
However, the net of underground faculties spread rapidly and by 1944 there were more than 300 lecturers and 3,500 students at various courses.
Many students took part in the Warsaw Uprising as soldiers of the Armia Krajowa and Szare Szeregi.
The German-held campus of the University was turned into a fortified area with bunkers and machine gun nests.
It was located close to the buildings occupied by the German garrison of Warsaw.
Heavy fights for the campus started on the first day of the Uprising, but the partisans were not able to break through the gates.
Several assaults were bloodily repelled and the campus remained in German hands until the end of the fights.
During the uprising and the occupation 63 professors were killed, either during fights or as an effect of German policy of extermination of Polish intelligentsia.
The University lost 60% of its buildings during the fighting in 1944.
Up to 80% of the collections (including priceless works of art and books donated to the University) were either destroyed or transported to Germany, never to return. 
The Polish defense plan ("Plan Zachód") called for a defense of Poland's borders in case of invasion from Germany.
Much of Poland's new industry and major population centers were located in the border area (particularly in Silesia); however, the lengthy border was very difficult to defend properly.
The plan was criticized by some of the Polish military and Western advisors, but supported by politicians who feared the effect of abandoning a significant part of the population to the enemy without a fight, and who were further discouraged from abandoning those territories as the Polish allies (France and the United Kingdom) did not guarantee the Borders of Poland and might well decide to allow the Germans to take the Polish Corridor they demanded in exchange for peace (pursuing a policy of appeasement).
The German invasion plan ("Fall Weiss") called for the start of hostilities before the declaration of war and for the Blitzkrieg doctrine of lightning war to be pursued.
German units were to invade Poland from three directions: from the German mainland through the western Polish border from the north, from the exclave of East Prussia from the territory of Slovakia, accompanied by allied Slovak units  All three assaults were to converge on Warsaw, while the main Polish army was to be encircled and destroyed west of the Vistula.
Poland, which already had a smaller population and thus a smaller military budget and army than Germany, was further disadvantaged because as the defender, unsure whether or not the war would start, its forces were not mobilized by 1 September. 
Gang rape occurs when a group of people participate in the rape of a single victim.
Rape involving at least two or more violators (usually at least three) is widely reported to occur in many parts of the world.
Systematic information on the extent of the problem, however, is scant.
One study showed that offenders and victims in gang rape incidents were younger with a higher possibility of being unemployed.
Gang rapes involved more alcohol and other drug use, night attacks and severe sexual assault outcomes and less victim resistance and fewer weapons than individual rapes.
Another study found that group sexual assaults were more violent and had greater resistance from the victim than individual sexual assaults and that victims of group sexual assaults were more likely to seek crisis and police services, contemplate suicide, and seek therapy than those involved in individual assaults.
The two groups were about the same in the amount of drinking and other drug use during the assault. 
The narration depicts the story of a survivor from the Warsaw ghetto during the Second World War, from his time in a concentration camp.
The narrator does not remember how he ended up living in the Warsaw sewers.
One day, in the camp, the Nazi authorities held a roll call of a group of Jews.
The group tried to assemble, but there was confusion, and the guards beat the old and ailing Jews who could not line up quickly enough.
Those Jews left on the ground were presumed to be dead, and the guards asked for another count, to see how many would be deported to the death camps.
The guards ask for a faster and faster head count, and the work culminates as the Jews begin to sing the prayer "Shema Yisroel".
In Schoenberg’s piece, the creed ends with Deuteronomy 6:7, which reads “and when thou liest down, and when thou riseth up."