The agreement, signed at a meeting held in Tunis under the chairmanship of Minister of Transport Mahmoud Ben Romdhane, in the presence of the Director of Congo's Air Transport, the CEO of Tunisair and the Director General of Civil Aviation, also establishes a bilateral co-operation programme in the technical fields, training and exchange of expertise.
In the context of the input sentence, determine the relationship between 'Tunisair' and 'Tunis'.
Options: distributed by, product/material produced, currency, location of formation