Concerning numbers of the "self-" or "stacked" type of these things has led to some of them not being counted in the JCR. For 10 points each:
[10h] The average number of what things over a year is used by Clarivate to determine the impact factor of entities such as Nature?
ANSWER: citations [or references; or self-citations or citation stacking; or Journal Citation Report]
[10m] The Nature Publishing Group, whose flagship journal has an impact factor of 69.5, merged in 2015 with this German publisher whose logo depicts a horse's head. The books in this publisher's classic series of Graduate Texts in Mathematics have yellow-and-white covers.
ANSWER: Springer [or Springer Science+Business Media; or Springer Nature; or Springer-Verlag]
[10e] Citation numbers are also used to determine a researcher-specific "index" denoted by this letter which is often used to inform funding decisions. This letter also denotes Planck's constant.
ANSWER: h [or h-index]
<Joseph Krol , Science - Other/CL/Misc>