Given the task definition and input, reply with output. This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Passage: The earliest signs were often not painted but consisted, for example, of paraphernalia connected with the brewing process such as bunches of hops or brewing implements, which were suspended above the door of the pub. In some cases local nicknames, farming terms and puns were used. Local events were often commemorated in pub signs. Simple natural or religious symbols such as 'The Sun', 'The Star' and 'The Cross' were incorporated into pub signs, sometimes being adapted to incorporate elements of the heraldry (e.g. the coat of arms) of the local lords who owned the lands upon which the pub stood. Some pubs have Latin inscriptions. Question: What plants were sometimes featured on pub signs?
hops