What is the fine-grained topic of the following text: Carl Jung dreamed of a round pool in Liverpool and declared that ‘Liverpool is the ‘pool of life.’ The poet Peter O’Halligan identified the location of the the ‘round pool’ as a cast-iron manhole cover in Mathew Street. Only return the topic.
Carl Jung's dream about Liverpool's 'pool of life' and its identification by Peter O'Halligan