 Complete the following phrase:  In May 1939, Grothendieck was put on a train in Hamburg for France. Shortly afterwards his father was interned in Le Vernet. He and his mother were then interned in various camps from 1940 to 1942 as undesirable dangerous foreigners. The first was the Rieucros Camp, where his mother contracted the tuberculosis which eventually caused her death and where Alexander managed to attend the local school, at Mende. Once Alexander managed to escape from the camp, intending to assassinate Hitler. Later, his mother Hanka was transferred to the 