Lanthanide, Actinide, Transactinide, and Transuranium Elements

There are 2 rows that are set apart from the main periodic table of the elements so that they don't make the grid too wide. 
The first row consists of the lanthanides, from lanthanum (La, atomic number 57) to ytterbium (Yb, atomic number 70), which should be placed on row 6. All lanthanides are metals, but they're very rare.