Teacher:This task involves annotating the answer type to a given question that involve some kind of complex reasoning (including numerical reasoning). Note that the questions require looking at more than one part of the passage to answer. There are 3 possible answer types (i) spans, (ii) numbers and (iii) dates. If the answer can be found in the passage, label it as "span". If the answer is a number, label as "number". Similarly, label "date" if you think the answer to the given question is a date.
Teacher: Now, understand the problem? Solve this instance: Passage: The conquest of Semigallian counties started in 1219 when crusaders from Riga occupied Mezotne, the major port on the Lielupe waterway, and founded the Bishopric of Semigallia. After several unsuccessful campaigns against the pagan Semigallian duke Viestards and his Samogitian kinsfolk, the Roman Curia decided in 1251 to abolish the Bishopric of Semigallia, and divided its territories between the Bishopric of Riga and the Order of Livonia. In 1265 a stone castle was built at Jelgava, on the Lielupe, and became the main military base for crusader attacks against the Semigallians. In 1271 the capital hillfort of Tervete was conquered, but Semigallians under the Duke Nameisis rebelled in 1279, and the Lithuanians under Traidenis defeated Livonian Order forces in the Battle of Aizkraukle. Duke Nameisis' warriors unsuccessfully attacked Riga in 1280, in response to which around 14,000 crusaders besieged Turaida castle in 1281. To conquer the remaining Semigallian hillforts the Order's master Villekin of Endorpe built a castle called Heiligenberg right next to the Tervete castle in 1287. The same year the Semigallians made another attempt to conquer Riga, but again failed to take it. On their return home Livonian knights attacked them, but were defeated at the Battle of Garoza, in which the Orders' master Villekin and at least 35 knights lost their lives. The new master of the Order Cuno of Haciginstein organised the last campaigns against the Semigallians in 1289 and 1290; the hillforts of Dobele, Rakte and Sidarbe were conquered and most of the Semigallian warriors joined the Samogitian and Lithuanian forces.
Question: When was the next to last campaign against the Semigallians?
Student:
date