Finding output given an S-box input of 8 bits
The S-Boxes of DES map from 6 bits to 4 bits. $2b$ written in binary representation is $10\ 1011$, not $001\ 01\ 011$ as you said. Now taking the first and last bit (as usual for DES S-boxes) yields us $11_{bin} = 3_{dec}$ which is the last row in your table. Taking the middle 4 bits equals to $0101_{dec} = 5_{dec}$. Now we can read the final result from the table as $9_{dec} = 1001_{bin}$