This online petitions (e.g. about change.org from Nigerian Ify Elueze) is for more than 200 kidnapped schoolgirls in Nigeria. They became from that radical Boko Haram sect kidnapped and held on. Sales, compulsive marriage and enslavement threaten them.
There is against this kidnapping an online petition which the heads of government are called on for strengthening the search for them. Here is from change.org with englisch info text:
and from "Walk Free" website with a online petition, too
and amnesty Internationally (the USA) has a similar action
Patrick Steinhuber, 94496 Ortenburg Germany