source: Tickets can be retailed for National Rail services, the Docklands Light Railway and on Oyster card.
target: Tickets can be purchased for National Rail services, the Docklands Light Railway or an Oyster card.
references: Tickets can be purchased for National Rail services, the Docklands Light Railway or an Oyster card. Tickets can be sold for National Rail services, the Docklands Light Railway, and on the Oyster card. Tickets can be sold for National Rail services, the Docklands Light Railway and on Oyster card. Tickets can be sold for National Rail services, the Docklands Light Railway and on Oyster card. Tickets can be sold for National Rail, the Docklands Railway, or on Oyster card. Tickets can be redeemed for National Rail services, the Docklands Light Railway, and on Oyster card. Tickets can be used for National Rail services, the Docklands Light Railway, or on Oyster card. You can buy tickets for National Rail services, the Docklands Light Railway, and on an Oyster card. Tickets can be sold for National Rail services, the Docklands Light Railway and on Oyster card. Tickets for the National Rail services, the Docklands Light Railway and on Oyster card can be sold.