Sentence:  The economic composition of the <WSD>"pronoia</WSD>" belonging to a heavy cavalryman in the fourteenth century, such as those who served in the "mega allagion" (regiment) of Thessalonike in the fourteenth century, is known to us from some of the "praktika" of <WSD>"pronoia</WSD>" holders that have survived. ... According to the "praktikon", the revenue of the "pronoiarios" consisted of two parts. The first was the "oikoumenon", that is, the sum of all the personal taxes paid to the <WSD>"pronoia</WSD>" holder by his "paroikoi" resident on the <WSD>"pronoia</WSD>", depending on the means of production at the disposal of each "paroikos". ... The second part consisted of secondary taxes and rights (e.g., on fishing, the "ennomion", and the tax on flax-retting units), but above all of land, on which, theoretically, the full tax was payablenb.... 
Meaning of the word marked with <WSD> tags:  An imperial grant to an individual of temporary fiscal rights in the form of land, incomes or taxes from land, fishing rights, etc., sometimes carrying with it an obligation of military service.