sentences:  The SS was, along with the HSM, the largest railroad company in the Netherlands.In the 19th century, the government constructed a number of state railroads, the "staatslijnen", to (major) cities and regions not yet served by the other railroads, but for which it was deemed important to connect them to the country's rail network.These lines were primarily located outside of the relatively densely populated Holland region, where the HSM ran services on the main lines.