Sadly (1) the university server does not support full text indexing on innodb.
Sadly (2) I decided no to teach you the difference between MyIASM and innDB.
Therefore the course solution will be the following (Unless any of you have a better suggestion):
(1) Create a myIASM table just for the full-text query (it could be a duplicated table)
(2) I allow you, specific for this table, to not implement/handle foreign key-constraints.