If reference to Sith, Yoda said:
Always two there are, no more, no less. A master and an apprentice
Yet, the same can be said of Jedi: Every master has 1 apprentice and every apprentice 1 master:
Yoda and Qui-Gon
Qui-Gon and Obi-wan
Obi-wan and Anakin
Anakin and Ahsoka
Obi-wan and Luke
Luke and Kylo
However, there is more than one Jedi Master/Padawan combination. Can the same be true of Sith without making Yoda a liar?
The reason for this question is: I saw this quote on Star Wars' Wiki
"The Dark Lords of the Sith are destined to rise again."
Note: "Lords" - plural...