Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Centre of São Luís' has mentioned 'Sea' in the following places:
Occurrence Sentence Text Source
The city has two major sea ports: Madeira Port and Itaqui Port, through which a substantial part of Brazil's iron ore, originating from the (pre)-Amazon region, is exported.
By the early twentieth century, St. Louis still exporting cotton to England by sea, through the lines and Booth Red Cross Line Line (the extended route to Iquitos) and company-Maranha Liverpool Shipping Company.